Still more than 1,000 artifacts are missing, including The Fight Between Carnival and Lent (which Polish authorities allege was stolen in 1939 by German invaders, reportedly taken away and sold in Vienna, and currently resides in the Kunsthistorisches Museum there) by Pieter Bruegel the Elder (donated to the Museum in 1937 by Stanisław Ursyn-Rusiecki) and priceless others.[3][4]