Empty frames from which thieves took Storm on the Sea of Galilee by Rembrandt and The Concert by Vermeer remain on display at the Isabella Stewart Gardner Museum in Boston in 2010. Midnight on Dec. 31, 2017, is the deadline to collect a $10 million reward being offered for information leading to the recovery of 13 stolen works worth an estimated $500 million.

Empty frames from which thieves took Storm on the Sea of Galilee by Rembrandt and The Concert by Vermeer remain on display at the Isabella Stewart Gardner Museum in Boston in 2010. Midnight on Dec. 31, 2017, is the deadline to collect a $10 million reward being offered for information leading to the recovery of 13 stolen works worth an estimated $500 millio