Hermitage Museum museum acquired the collection of Cristoforo Barbarigo, including five more canvases by Titian. Today, all of the paintings but one ("Danaë") by Titian in the Hermitage Museum came to St. Petersburg from the Barbarigo collection. The New Hermitage was opened to the public on 5 February 1852. In the same year the Egyptian Collection of the Hermitage Museum emerged, and was particularly enriched by items given by the Duke of Leuchtenberg, Nicholas I's son-in-law. Meanwhile, in 1851–1860, the interiors of the Old Hermitage were redesigned by Andrei Stackensneider to accommodate the State Assembly, Cabinet of Ministers and state apartments. Stakenschneider
Hermitage Museum insane attacked Rembrandt's painting "Danaë", displayed in the museum. He threw sulfuric acid on the canvas and cut it twice with his knife. The restoration of the painting had been accomplished by Hermitage experts by 1997, and "Danaë" is now on display behind armoured glass. In 1991, it became known that some paintings looted by the Red Army in Germany in 1945 were held in the Hermitage. Only in October 1994 the Hermitage officially announced that it had secretly been holding a major trove of French Impressionist and Post-Impressionist paintings from German private collections. The exhibition "Hidden Treasures Revealed", where