Athens' National Art Gallery showcases works from the 14th to the 20th centuries, and is best known for its collections of Greek and Renaissance art, including paintings by El Greco, Tiepolo and Brueghel.

CNN: Picasso, Mondrian works stolen in Athens art heist

London (CNN) -- A Pablo Picasso painting given to the Greek people in recognition of their resistance to Nazi occupation during World War II has been stolen from the National Art Gallery in Athens.

CNN: Picasso, Mondrian works stolen in Athens art heist