Johannes Vermeer, The Concert (detail), ca. 1665, Isabella Stewart Gardner Museum, Boston (stolen 1990)

Twenty-five years ago today, two thieves stole thirteen works of art–together valued at around half a billion dollars–from the Isabella Stewart Gardner Museum in Boston. It was the largest property crime ever in this country, and one of the most famous art thefts of all time. The stolen items have never been returned. The Gardner is still offering a $5,000,000 reward for their recovery.

Among the works lost were five drawings by Degas, a painting by Manet, three Rembrandts, and one of only about three dozen Vermeers in existence.

The Gardner is commemorating this milestone with a slideshow on its website, where you can learn more about these works and the events of March 18, 1990.