For more than a century, experts across three continents believed the Florentine Diamond had been recut, broken, smuggled, sold, or simply lost forever. In October 2025, three men in their sixties stood around a simple table in a bank vault in Quebec, Canada, watching an employee place a small brown leather suitcase before them. The suitcase was worn at the corners, the leather softened by time. Inside, wrapped in yellowed paper, was a gem the world had spent over a hundred years searching for.
Karl von Habsburg-Lothringen, grandson of the last Emperor of Austria, opened the case himself and began lifting the paper out piece by piece. The others leaned in, because none of them had ever seen what was inside. What he revealed was the Florentine Diamond, weighing 137. 27 carats with a pale yellow brilliance.
The stone remained in its irregular nine-sided form, exactly as a Venetian jeweler had cut it in 1615. It had not been touched. It had not been recut to hide its identity, as every serious gem historian had assumed. The diamond had been stored in that vault since around 1940, placed there by an exiled empress who carried it out of a collapsing empire and then asked her family to remain silent for years.
The surprise was not that the diamond itself had survived. Great stories endure through wars and revolutions. The surprise was the silence that surrounded it. For a century, the Republic of Austria, the European press, gem dealers, novelists, and FBI art crime experts all operated on the assumption that the Florentine Diamond had been lost, stolen, or destroyed.
Many assumed the Habsburgs had secretly sold it during their years of poverty and exile. The family was publicly accused of stealing its own treasure. The truth, when it finally emerged, was the opposite of theft. A stone that had passed through four dynasties and vanished from historical records had been kept intact by the royal family that owned it.
Not as a challenge to the law, but as a silent challenge to a republic that spent decades trying to seize it. The accepted scholarly account of the diamond’s origins begins not in a European court, but in the minds of the Gonds of southern India, the same legendary source that produced the Koh-i-Noor and the diamond that would become known as the Hope. There, in the early sixteenth century, a raw yellow crystal of exceptional size emerged from the earth. According to accounts drawn from later Medici inventories, Dom Luís de Castro, Count of Monsanto, the Portuguese colonial governor of Goa, acquired the rough crystal from a king of Vijayanagara in what is now southern India.
Castro did not keep the crystal for himself. He deposited it with the Jesuits in Rome for safekeeping, where it waited through lengthy negotiations before money and ambition arrived. Against this realistic account stands the legend, which is worth telling precisely because so many believed it. According to a story largely rejected by historians, Ludovico van Berquen, a Flemish gem cutter in Bruges, cut the diamond for his patron Charles the Bold, Duke of Burgundy.
In this version, Charles wore the stone on his person when he fell at the Battle of Nancy on January 5, 1477. A soldier or peasant supposedly found it on the duke’s body, mistook it for a piece of glass, and sold it for a florin or two. From there, the legend claims the diamond passed through various hands before finally reaching Florence. The problem is that the stone itself does not support the story.
The cut visible in all surviving descriptions is a complex double rose cut in the Indian style, not the simpler pyramidal and table cuts used by European jewelers in van Berquen’s era. The diamond’s weight matches no documented Burgundian stone. Even the sources disagree on which battle took place. Most gem historians describe the legend as fabricated, yet it remains popular because the image of the dead duke and the soldier selling a king’s ransom for a coin feels appropriate for a diamond.
The real origin, from an Indian mine and a Jesuit vault in Rome, is less romantic and more likely. The men who bought the stone were not soldiers or popes, but bankers, which suits Florence more than any battlefield. Ferdinando I de Medici, Grand Duke of Tuscany, purchased the rough crystal from the Castro-Noronha family for 35,000 Portuguese cruzados, a sum indicating how seriously the Medici banking dynasty took the acquisition. The Medici funded the Italian Renaissance.
They were the patrons behind Michelangelo, Leonardo da Vinci, Botticelli, and Raphael. A rough crystal of this size deserved a place in a great art collection. The task of transforming the stone fell to Cosimo II de Medici, Ferdinando’s son, who commissioned the skilled Venetian jeweler Pompeo Studenti, working in Florence. The polished gem was delivered on October 10, 1615, in the form it still has today: its irregular nine-sided shape with 126 facets in a double rose cut.
An inventory prepared upon Cosimo’s death recorded the acquisition, describing the stone as polished on both sides and mounted in a diamond-set ring. The Florentine became an ornament of the court. A surviving portrait shows Archduchess Maria Maddalena of Austria wearing the jewel at the height of Florence’s wealth. The first time the outside world gained a reliable look at the diamond was in 1657, when the French jeweler, traveler, and historian Jean-Baptiste Tavernier arrived in Florence.
Tavernier, the same man associated with the blue diamond that would one day captivate the world, was shown the Florentine among the possessions of Ferdinando II de Medici. He described it as the largest diamond in Europe, noted its pale lemon-yellow color and distinctive double rose shape, and then did what made his account so widely quoted: he assigned it a value. Tavernier estimated the stone at 600,000 scudi, an enormous figure that placed the Florentine among the most valuable objects on the continent. The Medici, despite their vast wealth, could not solve the one problem that ends every ruling dynasty: male heirs.
When the last Medici Grand Duke, Gian Gastone, died without an heir in 1737, Florence’s uninterrupted rule over Tuscany ended, and the diamond passed with the duchy. Its fate was not decided in Florence, but in the diplomatic corridors of Vienna, through one of the century’s most important marriages. In 1736, Francis Stephen of Lorraine married Maria Theresa of Austria, founding the Habsburg-Lorraine dynasty that ruled a vast Central European empire for nearly two hundred years. The Treaty of Vienna of 1738 was the document that transferred the stone, confirming the transfer of Tuscany in its entirety to Francis Stephen in exchange for his renunciation of the Duchy of Lorraine to France.
The Florentine Diamond, as part of the Medici Grand Ducal treasury, moved north to Vienna with its new owner. There, it was displayed in Case No. 13 of the Imperial Treasury at the Hofburg Palace. The way it was catalogued was of critical importance.
The diamond was placed among what the dynasty called the private imperial court jewels, kept separate from the royal crown jewels and recorded in their own registers as private family property. This distinction between private property and state jewels was merely an accounting measure in the eighteenth century, and a legal weapon in the twenty-first. When Francis Stephen was crowned Holy Roman Emperor in 1745 as Emperor Francis I, he wore the Florentine in his imperial crown. Maria Theresa herself is believed to have given the stone the name it has carried ever since.
Maria Theresa and Francis Stephen were the parents of Marie Antoinette, meaning this unique yellow diamond touched both the Austrian imperial court and, through their daughter, the doomed Bourbon court at Versailles. The diamond continued to travel with family fortunes. In 1810, Marie Louise of Austria, the archduchess who became Napoleon Bonaparte’s second wife, received the jewel as part of the Habsburg possessions connected to her wedding. When Napoleon’s reign ended in 1814, she returned to Austria and brought the diamond with her.
By the nineteenth century, the Florentine had established itself as one of the highest ornaments of the Habsburg court, and the dynasty finally did what the Medici never had: they measured it precisely. In 1865, Dr. Moritz, head of the mineral treasury of the imperial and royal court, officially documented the stone’s weight and exact specifications. A plaster cast was made, and a rhinestone replica was created in Paris with great care to match the color of the original.
The official color description was “wine mixed with water,” a strangely delicate phrase for an imperial inventory, and accurate in describing a luminous pale yellow that no modern term can precisely capture. This measurement transformed the Florentine from legend into a documented artifact. The American writer Nathaniel Parker Willis, visiting the Imperial Treasury in Vienna in 1833, described it as a “mass of light,” adding that although there were huge diamonds surrounding it, it hung among them like Hesperus among the stars. The secret of this effect lay in the cutting method, which later enabled the stone’s precise identification.
The Florentine double rose cut, with identical triangular facets on top and bottom, was developed in the sixteenth and seventeenth centuries to enhance light reflection in candlelit rooms. Unlike the modern brilliant cut, designed for sparkle under electric light, the double rose disperses light more softly, producing the ethereal glow that observers tried to describe with phrases like “mass of light. ” It was a cut designed for a world lit by fire, and it continued to shine in a court that still depended on candles and chandeliers. The only known original photograph of the stone, a black-and-white image taken between 1870 and 1900, shows it set in a hat pin.
That photograph alone would prove crucial, as it became the only fixed image researchers could rely on during the century the diamond was missing. In the final weeks of World War I, the empire that had protected the Florentine for nearly two centuries collapsed within days. On the morning of November 1, 1918, Emperor Karl I, the last Habsburg ruler, realized his kingdom could not be saved. Crowds in the streets of Vienna were demanding a republic.
With the monarchy collapsing around him, Karl turned to his loyal chief steward, Count Leopold Berchtold, and entrusted him with a sensitive and urgent task. Berchtold and his men went to the Hofburg Imperial Treasury and emptied dozens of pieces from the display cases in Case No. 13, the same case that had held the Florentine since the eighteenth century. In the chaos of revolution, they transported the valuables across the border to Switzerland on November 4, 1918, three days before Karl issued his official declaration withdrawing from Austrian affairs on November 11.
Among the pieces removed were the Florentine Diamond still set in its hat pin, the diamond tiara once worn by Empress Elisabeth, known as Sisi, and a brilliant-cut diamond bracelet set with a large emerald that Maria Theresa had worn on sleigh rides. The jewels were first deposited at the Swiss National Bank in Zurich. Once they crossed the border, the diamond was no longer mere private ornament; it became disputed property, and claims quickly mounted. The new First Austrian Republic, rebuilding from the ruins of the empire, moved to use legal mechanisms to claim all Habsburg property as state property.
The Kingdom of Italy also filed a claim for the Florentine, arguing that the Medici had bequeathed it to the people of Florence and that its transfer to the Habsburgs in 1737 was illegal. Every claimant wanted the stone, and none of them had it, because it sat in a Swiss vault under the control of a family that had lost everything except its jewelry. The family’s defense rested on two facts, one geographic and one procedural. In 1921, the Austrian Attorney General declared that all pieces in the collection, including the Florentine, were pure private property of the Habsburg-Lorraine family, a position the Austrian state reaffirmed decades later.
Because the pieces were physically outside Austria, when confiscation laws were enacted in the republic, the principle of territoriality prevented those laws from reaching them. The empire that had protected the diamond for nearly two centuries disappeared within a week, but the eighteenth-century decision to classify it as private property rather than public property quietly survived the destruction, waiting to be used. The collapse of the monarchy produced not only a republic, but a set of laws designed specifically to dismantle what the Habsburgs had been. The republic abolished all noble and imperial titles under the Nobility Abolition Act of 1919, and the broader Habsburg Law sought to seize Habsburg assets for the state.
The Florentine, as the most famous movable piece the family owned, fell directly in the path of this goal. In 1923, the Allied Reparations Commission issued its ruling on the Italian claim and rejected it, determining that the diamond was private property of the Habsburg family. This decision carried enormous weight because it came not from the family itself asserting its rights, but from an external body that reviewed competing claims and concluded the gem belonged to the family, not to the Italian state or the people of Florence. What gave the legal argument its strange shape was that it would be discussed in the absence of the thing itself.
The Austrian state believed it had a right to a diamond no one could find. The family possessed a stone the law said was theirs, but the world believed they had lost it or sold it. For the next hundred years, the legal status of the Florentine would be debated by people who did not know whether the object they were arguing about still existed in its original form. Into that gap rushed every theory the twentieth century could invent.
By 1921, the European press had already begun reporting the disappearance of the Florentine from the family’s possession in Switzerland. This coincided with a catastrophic season. Karl I made two failed attempts to regain control of Hungary that year, the second ending in his arrest and forced exile from Central Europe. He and Empress Zita were transported on British ships down the Danube to the Mediterranean, where their ship finally docked in Madeira.
There Karl died of pneumonia on April 1, 1922, leaving Zita a widow at twenty-nine with eight children and almost no protection. Against this picture of an impoverished exiled imperial family, suspicions about jewelry sales became prominent. A genuine betrayal worsened these suspicions. Karl and Zita reportedly fell victim to a scheme by a trusted financial adviser who managed to steal several pieces from the collection.
The Swiss diamond dealer Alois de Sonnheimer claimed in his memoirs, published in 1966, that the family’s jewels were offered to him by the emperor’s private secretary, a man named Steiner, later identified as Bruno Steiner, and that he purchased several pieces. Sonnheimer wrote that the exiled emperor needed money, and according to his account, emeralds were cut up, necklaces and tiaras broken, and diamonds removed from their settings. Even the Florentine itself was reportedly removed from its brooch setting and broken. The accusation against Steiner was not mere gossip.
A 1923 New York Times article mentioned that Baron Steiner had been arrested for questioning regarding the loss of the Austrian crown jewels. A later account claimed that the missing diamond tiara of Sisi was last seen after 1921, when Steiner wore it during a drunken episode before it disappeared forever. Multiple sources support the idea that a trusted insider converted some Habsburg jewelry into cash, a fact that is not in dispute. What remained disputed for a hundred years was whether the Florentine itself was among the things he sold.
The discovery of the stone in its original form in 2025 answered that question. The prevailing view among serious gem historians was that the stone had been recut and sold, probably in the United States, based on the logic that any large stolen diamond would be recut to hide its identity. A 99. 52-carat cushion-cut yellow diamond that appeared on the American market in 1923 raised brief suspicions before its shape and provenance were ruled out.
A more interesting diamond appeared at Christie’s autumn auction in Geneva in 1981, a yellow brilliant of just under 82 carats. The seller said it had been in her family’s possession since shortly after the war and had been recut from an old unusual shape, a theory allegedly supported by a prominent British diamond historian. Others claimed the stone had been smuggled to South America, pawned to finance Karl’s Hungarian adventure, seized by Nazi Germany, or secretly returned to Vienna by American forces after World War II. All these theories failed for lack of evidence.
They all shared one fatal blindness: none of their proponents knew that Empress Zita had placed it in a bank in Quebec and lived keeping the secret until 1989. The survival of the diamond comes down to one woman, and her life is the engine of this entire story. Zita von Bourbon-Parma was born in 1892, became Empress of Austria and Queen of Hungary at twenty-four, and by twenty-nine was a widow with eight children, stateless, and nearly bankrupt after her husband’s death in Madeira. She did not surrender to despair.
She continued to travel, settling first in the Basque region of Spain, then in Belgium where the family lived through the 1920s and 1930s. Their lives were organized around survival and around her children, the eldest of whom, Archduke Otto von Habsburg, later became the family’s most prominent public figure. Danger returned in a new form in the 1930s. From Belgium, Otto waged a public campaign against the growing Nazi threat and offered his services to the First Austrian Republic in its struggle to remain independent from the Third Reich.
When Germany annexed Austria in March 1938, he was declared an enemy of the state. For the second time in a generation, the family found itself in mortal danger. When German forces invaded Belgium and France in May 1940, Zita was once again fleeing, this time with eight children, some now adults, and the surviving Habsburg jewels that accompanied them. One incident from that journey captures the woman’s character precisely.
At the Spanish border, a guard recognized the former empress and allowed her to cross. Then, at her request, he allowed all the desperate refugees waiting in line behind her to enter Spain as well. Karl von Habsburg-Lothringen, recounting the scene decades later over dinner in a Viennese restaurant, gestured at the empty air as if the long line of refugees were still standing there, and quoted his grandmother’s instructions to the guard regarding the people behind her: “All of them. ”
The family moved from Spain to Portugal, then with American help to North America in 1940, finally settling in Sillery, a suburb of Quebec City, where they lived modestly.
Zita said she loved Canada and Quebec and had a special affection for French Canadians who treated them kindly, and she had no intention of leaving. Throughout her journey, she carried the jewels in a small case, described in some accounts as a brown leather bag and in others as a cardboard suitcase. Perhaps the two descriptions reflect different stages of the journey. Karl later spoke of it with great emotion, describing it as a small emigrant bag, the kind one carries one’s last possessions in while fleeing.
Once the family settled in Quebec and Zita could finally breathe, she placed the bag in a bank vault in Quebec. Around 1940, in a bank and city whose names the family could no longer recall precisely. In 1953, she returned to Europe. But she made a deliberate decision to leave the jewels in the vault.
She died in Switzerland on March 14, 1989, at the age of ninety-six, having kept her secret for nearly half a century from a continent that spent all those years wondering about the fate of the fourth-largest diamond in the world. What Zita built around the diamond was not just a hiding place, but a covenant designed with the precision of a woman who fully understood the price of persecution. She told only two of her sons where the jewels were stored: Archduke Robert and Archduke Rudolf. She deliberately kept the rest of the family in the dark, including her eldest son, Crown Prince Otto, the most prominent surviving Habsburg, who was by then a member of the European Parliament.
The instructions accompanying the secret were clear. The location was to remain secret for one hundred years after Karl’s death, meaning at least until April 1, 2022, the centenary of the emperor’s death in Madeira. The motive was not emotional but practical, rooted in the family’s history of exile and confiscation. For security reasons, given everything the family had been through, Zita recommended that her descendants protect the existence of the collection in secret.
A family that had fled twice to save its life, and had seen a republic and a foreign regime compete over its property, understood that the most valuable treasure is the one no one knows exists. The covenant turned the diamond’s disappearance from a misfortune into a strategy, asking each generation to choose silence over the glory of revealing what they owned. The mechanism of passing the secret was the most disciplined part of the story. Before their deaths, Robert and Rudolf each passed the secret to just one of their sons.
Lorenz von Habsburg-Lothringen, Robert’s son and husband of Princess Astrid of Belgium, and Simeon von Habsburg-Lothringen, Rudolf’s son and managing director of an asset management firm in Liechtenstein. Knowledge passed vertically, from father to son, without spreading horizontally among family members. Otto, the eldest son, died in 2011 without knowing the diamond survived. Due to his mother’s design, he never knew the family still held its most famous possession.
Even more striking, the current head of the family, Karl von Habsburg-Lothringen, did not know either. He was not among Otto’s sons who knew the secret, and he learned of the jewel’s existence for the first time in 2024 when Lorenz and Simeon contacted him. He later admitted that his father mentioned the subject casually, but Karl paid no attention at the time and did not think about it much. The covenant worked so well that it outlasted the two brothers who carried it, passed seamlessly to one son each, and kept the head of the family completely ignorant of his greatest inheritance until he was past sixty.
A secret that outlives its keepers and remains hidden from the head of the family is not an accident; it is a deliberate construction. Zita built this secret to last exactly one hundred years. With the centenary period ending in April 2022, the two guardians, Lorenz and Simeon, informed Karl in 2024, and the decision was made to reveal the secret. The official announcement came in November 2025, with The New York Times granted exclusive access to document the moment.
But before that, the family had to do what none of them had ever done: look at the diamond. In October 2025, the three cousins, Karl, Lorenz, and Simeon, traveled together to Quebec, accompanied by journalists and Christoph Kürner, the sixth generation of owners of AE Kürner, a Viennese firm that had served the imperial Habsburg family as court jewelers since 1814. Kürner brought the tools of his trade: a portable jeweler’s scale, a refractometer, and an electronic diamond tester. The scene at the table was quiet and unhurried.
Karl stood with his cousins, slowly opened the worn case, and carefully removed the yellowed paper wrapping each jewel, working toward the diamond itself, which was wrapped separately from the others. The three men, all living in Europe, were seeing the jewels for the first time in their lives. When the last paper was removed, the Florentine appeared, still bright and attractive. The stone that could be set in the jeweled brooch was among the pieces on display, the brooch recognizable from the old photograph that had been the world’s only reference for a century.
Kürner’s reaction was that of a man who had spent his life surrounded by precious jewels and still found himself unprepared. He described it as a sublime moment, perhaps one of those moments one experiences only once in a lifetime. Of the stone itself, he said it was rare to see a diamond of such perfection, so pure, its color reminding him of a good Scotch whiskey. He noted that the cutter had left the original crystal surface in some places along the edges.
The mark of a craftsman made more than four centuries ago was still visible on the stone. He also noticed something less reassuring: the diamond was loosely set in its place. He speculated that someone might have begun the process of selling it separately, perhaps even considered dismantling it before changing their mind or being unable to complete the process. The detail was consistent with Sonnheimer’s old account, but also consistent with the idea that the setting had simply worn down over a century in a vault.
What the vault did not contain was also important. Kürner prepared a checklist from the 1918 Imperial Treasury catalog, and many of the pieces listed were not among the sixteen found in Canada. These included a diamond-set tiara with a 44-carat stone, an emerald necklace, the famous Rose Necklace of Maria Theresa, and Sisi’s diamond tiara. The latter was said to have been last seen when Steiner wore it during a drunken episode before disappearing.
Kürner said, “No one knows where these pieces are,” and Karl admitted he did not know either. The recovery was real, but incomplete. It was a partial restoration of a collection scattered over a century. For Karl, the most moving thing in the bag was not the diamond at all, but the medal of the Order of the Golden Fleece, the highest order of the dynasty, founded in 1430.
He said he was more interested in the present than the past. Then he paused and said, “But my grandmother,” the central figure of the 2025 revelation. Karl von Habsburg-Lothringen was born on January 11, 1961, in Starnberg, Bavaria. He is the grandson of the last Habsburg emperor and the current head of the Habsburg-Lorraine family.
He exercises his role without any formal trappings, using no title because Austrian law abolished all noble and imperial titles in 1919. His legal name is simply Karl Habsburg-Lothringen. He succeeded his father Otto as head of the family on January 1, 2007, when Otto stepped down, and he was sixty-four years old at the time of the revelation. His life has been one of public service rather than nostalgia for a vanished throne.
Karl served as a member of the European Parliament for the Austrian People’s Party from 1996 to 1999. He holds degrees in law, philosophy, and political science. He completed pilot training in the Austrian Air Force, holds the rank of reserve captain, and is a paratrooper. From 2008 to 2020, he served as president of Blue Shield International, an organization dedicated to protecting cultural heritage in conflict zones, work that placed him in direct confrontation with the kind of cultural loss his own family suffered.
He has been regularly present in Ukraine since the start of the Russian invasion and has publicly called for the overthrow of Vladimir Putin. He is also the head of the Order of the Golden Fleece, the order whose medal was stored in the Quebec vault, one reason he was more moved by that medal than by the diamond. Karl described the discovery with the understatement of a man determined not to overstate it. He said the Florentine was in a bank vault in Canada with other pieces of the family jewelry.
In the strict sense, the jewels had never disappeared. Only a very few people knew where they were. Even a year earlier, he himself had known nothing about them. That understatement is itself a kind of argument.
A man trying to inflate his treasure would not insist it had never been lost, and a family that had stolen something would not invite The New York Times to film them unwrapping it. The decision to reveal the diamond reopened the legal question that had persisted through a century of obscurity. The moment Karl confirmed the stone’s existence and location, he gave the Republic of Austria something it never had before: a specific object in a known place that could be claimed. The Austrian government commissioned its own response, and Karl, for his part, prepared a defense based not on possession but on the same papers his ancestors presented in 1921.
The man who broke a century of silence understood that breaking it would ignite a battle, and he chose to begin it on the basis of law rather than secrecy. Austria moved almost immediately after the announcement. The Vice Chancellor and Minister of Culture stated that if the Florentine were proven to be the property of the Republic of Austria, proceedings for its return to the state would begin. By December 2025, Austria had formally established the Florentine Commission.
A committee of experts was convened to assess whether the state had a legitimate legal right, holding its first meeting on December 4, 2025, with results expected by autumn 2026. The government’s language was sharp, describing the jewels as having been taken from the treasury and transported abroad, a description that portrayed the 1918 transfer as a removal of state property rather than the protection of private property. The core of the dispute lies in two conflicting principles. Austria’s position rests on the Habsburg Law of 1919, which stated that Habsburg property belonged to the state, and on the claim that the imperial jewels were state possessions the family had no right to move.
The Habsburgs defend their position by arguing that the Florentine and other pieces found in Canada were kept in a separate register classified as private family property, not public crown jewels, and that they were outside Austrian territory when the 1919 law was enacted. Under the principle of territoriality, Austrian law could not apply to property that first sat in Switzerland and then in Canada. The family points to documents in the Swiss Federal Archives showing that Austria tried, unsuccessfully, to pressure Switzerland to surrender the pieces on purely legal grounds in 1921. To support their case, the family commissioned the British historian Richard Bassett, author of two major biographies of Maria Theresa and a history of the Habsburg army, and a professor at Christ’s College, Cambridge, to prepare a report on the legal status of the jewels.
Bassett’s report asserts that the jewels are separate private property and that the Austrian Habsburg Law is irrelevant to the question of ownership. It also notes that the jewels were transferred to a Canadian trust, whose rules ensured the preservation of the family heritage of cultural and historical significance, kept together in their entirety, and remaining in Canada for the long term. The family also relies on history, including the 2001 confirmation by the then-director of the treasury of the Kunsthistorisches Museum that the recovered pieces were private Habsburg jewelry, and the 1921 declaration of the Austrian Attorney General that these pieces were the pure private property of the family, at a time when the government was fully aware of their location. Behind this legal language lie strategic calculations the family has not entirely concealed.
The Habsburgs fear the Republic of Austria might claim jewels that remained hidden for over a century. The decision to keep the collection in Canada rather than move it to Vienna is partly intended to keep it outside Austrian jurisdiction while outstanding matters are settled. The commission’s final decision may depend on whether the classification of the diamond as personal property before the abolition of the monarchy can be proven, or whether Austria can prove it was formally part of state regalia. After a hundred years in which the central question was whether the diamond existed at all, the question has finally narrowed to whether a republic that abolished the royal dynasty can claim its most private jewel.
According to the latest reports, the diamond remains in the Quebec bank vault where it was placed around 1940. The family has placed it in a Canadian trust under Quebec law, with the direct descendants of Karl I and Zita as beneficiaries. The family does not intend to sell the diamond and has refused to set a price for it. The only public estimate, a modest figure far below the value of comparable historical gems, reflects not the diamond’s importance but the legal uncertainty surrounding it, and the family’s stated intention never to give it up.
An exhibition of the collection is being planned at the National Museum of Fine Arts of Quebec in Quebec City, where the province’s Culture Minister described it as a unique story connecting Quebec to the Habsburg family. The Austrian Florentine Commission is expected to present its findings by autumn 2026, a report that will determine whether Austria formally files a request for the return of the collection. The context of the revelation added an unexpected dimension. The announcement came shortly after the Louvre theft, when burglars used a forklift attached to a truck to steal crown jewels from the Apollo Gallery in Paris.
The contrast was stark: great public institutions had failed to protect priceless holdings entrusted to them, while the Habsburg dynasty had kept its own core private treasures intact through consistent and sustained secrecy. A family long suspected of having lost or sold a diamond had guarded it better than the guards of the world’s most famous museum guarded its own jewels. Accounts written during the diamond’s period of disappearance reveal how completely the world had surrendered to conjecture. A 2020 novel by Amy Mergerson imagined an American family inheriting the lost Florentine.
Mergerson, through conversations with FBI art crime experts and gem library curators, concluded the stone had probably been recut. That view represented the scholarly consensus until 2025. A French film built a story around the theft of a diamond believed to have already vanished. During a visit to an Austrian museum, Mergerson was told by a historian that the empty display cases represented the crown jewels stolen by the Habsburgs, and would remain empty until the jewels returned to Austria.
The truth, that an aging empress had simply placed the stone in a Canadian vault and asked her family to remain silent for a hundred years, was stranger than anything novelists dared invent. The Florentine is unique among the world’s great recovered gems precisely because of the way it was saved. Other great diamonds were taken by imperial conquest or sold commercially again and again. The Hope Diamond was sold repeatedly.
The Orlov was given as a political gift to Catherine the Great. Each of them ended up in a governmental collection or museum through institutions. The Florentine survived through the determination of a single widow, who chose secrecy over display, instruction over glory, and held to her covenant so firmly that it outlasted her death and the deaths of her sons, keeping the head of her family ignorant until the year before it was opened. The family did not hide the diamond because they stole it.
They hid it because they learned twice the consequences of the world knowing what they owned. They decided that a stone unseen for a hundred years is a stone that cannot be taken.