Boston Heist Paintings
On March 18, 1990, two art thieves disguised themselves as police officers and ransacked the Isabella Stewart Gardner Museum, making off with thirteen famous paintings by artists like Rembrandt, Vermeer, and Flinck, all estimated to be around $500 million in total value. The culprits were never caught, and the museum recently extended a $10 million reward indefinitely for anyone who helps to recover the stolen artwork.