In the spring of 1945, deep inside an Austrian salt mine, hundreds of crates held some of the world’s greatest treasures—a Vermeer, a Michelangelo, the Ghent Altarpiece—all wired with explosives. The order was to destroy everything rather than let it fall into Allied hands. The art survived by days, but surviving the war was only the beginning. The theft was no random act.
It was organized like a government department. In July 1940, weeks after France fell, Hitler authorized a special task force to comb occupied Europe for art. Named the Einsatzstab Reichsleiter Rosenberg, it became the largest art-looting operation in history. In Paris, the group set up inside the Jeu de Paume museum.
Between 1940 and 1944, more than 20,000 looted works passed through its rooms—most from Jewish families who had fled or been arrested, including the Rothschilds and dealer Paul Rosenberg. Every piece was cataloged, photographed, and crated for shipment to Germany. Two men controlled where the best went. Hitler wanted the finest works for a grand museum he planned in Linz, the Austrian city of his youth.
Hermann Göring, the second most powerful man in the Reich, built his own collection, visiting the Jeu de Paume around twenty times to choose pieces for his estate. By the war’s end, he had gathered roughly 1,500 works, many stolen. Hitler tracked his future museum through leather-bound albums filled with photographs of paintings marked for Linz. Not everything the Nazis took was meant to be kept.
Years earlier, they had stripped German museums of modern art they branded “degenerate”—works by Picasso, Matisse, and the German expressionists. Approved dealers were allowed to sell those abroad for foreign currency the Reich desperately needed. The same machine that hoarded old masters quietly sold off the modern ones. The looting spread across all of occupied Europe.
Families across Paris came home to pale rectangles on walls where paintings had hung for generations. Dutch masters were bought cheaply or seized through forced sales. Renaissance works were pulled from Italy. In Poland, entire museum and church collections were crated into trucks in the first weeks of occupation, before the country had even stopped burning.
By 1945, hundreds of thousands of objects had been taken from across the continent. As Allied armies closed in, the Nazis hid the hoard in castles, monasteries, and mines, where steady temperatures protected the canvases. The largest hiding place was at Altaussee in the Austrian Alps. The job of finding it fell to an unlikely unit: the Monuments, Fine Arts, and Archives sections, later known as the Monuments Men.
Fewer than 400 served across the whole war—curators, art historians, architects, and archivists—with almost no vehicles, staff, or authority. In April 1945, American troops uncovered a salt mine at Merkers in central Germany. Inside lay much of the German gold reserve and a trove of paintings pulled from Berlin’s museums. General Eisenhower came down to see it himself.
But it was not the largest find. That was at Altaussee, where more than 6,000 paintings were stored in tunnels, along with sculptures, drawings, Michelangelo’s marble Madonna from Bruges, and the Ghent Altarpiece. As the Allies advanced, local Nazi officials ordered the mine destroyed. Crates of explosives were carried inside.
Austrian miners, unwilling to see the mine and their livelihood blown apart, secretly removed the bombs. When Monuments officers Robert Posey and Lincoln Kirstein reached the tunnels in May 1945, they found the art intact. Conservator George Stout then spent weeks carefully bringing each piece back to the surface. Recovering the art was not the problem.
Knowing who it belonged to was. One woman’s work proved decisive. Rose Valland had stayed at the Jeu de Paume throughout the occupation, quietly watching the Germans sort their loot. Without their knowledge, she recorded what came in, where it was sent, and which trains carried it away.
Her notes later helped Allied teams trace tens of thousands of works back to their owners. The recovered art was carried to collecting points the Allies set up across Germany, the largest at Munich and Wiesbaden. There, it was unpacked, inventoried, photographed, and sorted by country. The Allies returned works to national governments first, leaving those governments to find the individual families.
It seemed reasonable on paper. In practice, it left thousands of pieces stranded for the rest of the century. Most of the art went home. Whole national collections from France, the Netherlands, Italy, and Poland were handed back within a few years.
But returning a painting to a country was not the same as returning it to a person. Many original owners had not survived the war. Heirs were scattered or untraceable. Works with no claimant were absorbed into state collections, where some quietly remain.
Not everyone agreed on how the recovered art should be handled. In November 1945, the US Army ordered 202 German-owned paintings shipped to the United States for safekeeping. More than twenty Monuments officers objected in writing, led by Walter Farmer, who ran the Wiesbaden collecting point. They argued that removing a nation’s cultural property, even a defeated enemy’s, was exactly what they had fought to prevent.
Their protest became known as the Wiesbaden Manifesto. The paintings were eventually sent back. Other art went east and never came back. As the Red Army pushed into Germany, Soviet trophy brigades followed, collecting paintings, sculpture, and whole museum holdings to carry home as payment for the destruction the Soviet Union had suffered.
Some works were returned in the 1950s. Many were not. One of the most famous was Priam’s Treasure, the hoard of Trojan gold dug up by Heinrich Schliemann. Taken from Berlin in 1945, it vanished for half a century until the Pushkin Museum in Moscow finally admitted in 1994 that it had had the gold all along.
For years, the Soviet Union denied holding it. Only after the Cold War ended did Russian museums begin to admit how much trophy art sat in their storerooms. In 1998, Russia passed a law declaring the works state property and compensation for wartime losses, making return all but impossible. Much of what the Red Army carried east in 1945 is still there today.
A few treasures simply disappeared. The Amber Room, a chamber of carved amber panels taken from a palace near Leningrad, was lost in the final months of the war and has never been found. Raphael’s Portrait of a Young Man, seized from a museum in Krakow in 1939, has not been seen since. It is often called the most important painting still missing from the war.
For decades, the search slowed. The collecting points closed in the early 1950s. The Monuments Men went home, and unclaimed works settled into museums and private collections around the world. Many stayed there for two generations, their histories quietly forgotten, hanging on gallery walls with no mention of how they had been acquired.
Then the question came back. In December 1998, representatives of 44 countries met in Washington and agreed on principles regarding Nazi-confiscated art. They called on museums and governments to research the history of the works in their care and find just and fair solutions with the families they had been taken from. The agreement carried no force of law, but it reopened thousands of cases everyone had assumed were closed.
One of them became famous. Maria Altmann, an Austrian-born refugee living in California, spent years fighting to recover five paintings by Gustav Klimt that had belonged to her family before the Nazis seized them in Vienna. Among them was the golden portrait of her aunt, Adele Bloch-Bauer. For Maria, the fight was never only about value.
The portrait was one of the last links to a family the war had scattered. Winning it back meant forcing Austria to admit how it had been taken. In 2006, an arbitration panel ruled in her favor. The portrait was later sold for $135 million, one of the highest prices ever paid for a painting.
Some discoveries came by accident. In 2012, German tax investigators searching a Munich apartment found more than a thousand works stacked among the belongings of an elderly recluse named Cornelius Gurlitt. His father had been one of the dealers the Nazis used to handle loot. Among the hoard were pieces by Picasso, Matisse, and Chagall that had not been seen in public for 70 years.
The find caused an international sensation. Gurlitt died the next year and left the entire collection to a museum in Switzerland, which agreed to keep researching and return anything proven to be looted. The Gurlitt case was a reminder that the story is not history yet. A painting still surfaces at auction with an empty gap in its record covering the war years, and a researcher starts pulling the thread.
A family receives a letter telling them a work their grandparents once owned has been found in a museum on another continent. More than 80 years after the war, the accounting is still unfinished. Some paintings came home. Some hang in museums under new labels.
Some vanished into private rooms, bank vaults, and museum storerooms in the East. Provenance researchers still match a name on a wartime list to a canvas on a gallery wall. And somewhere, perhaps, a missing masterpiece hangs in plain sight, seen every day by people who have no idea where it came from.
