Isabella Stewart Gardner Museum - 1990 art heist

The Isabella Stewart Gardner Museum houses a permanent empty frame and catalog of 13 works stolen during the March 18, 1990 heist, the largest unsolved art theft in U.S. history. Among the missing pieces were works by Vermeer and Rembrandt; the museum continues to offer a $10 million reward for information leading to recovery. The museum’s collection and the unresolved status of the theft make the original works effectively 'hard to find' for visitors and researchers.