The Musée Unterlinden officially opened its doors on 3 April 1853. In addition to the 3rd-century mosaic discovered in Bergheim in 1848 and plaster casts of ancient sculptures, it presented artworks confiscated during the French Revolution, such as Grünewald’s Isenheim Altarpiece and Martin Schongauer’s Altarpiece of the Dominicans. When it opened, the museum occupied onl...