Paintings by Christoffer Willhelm Eckersberg, the father of Danish painting.

Art by Victor Vasarely, a French-Hungarian artist often considered to be the grandfather of the Op Art movement.

I should note that this piece, Zebras, is often considered the first piece of the movement.

Landscapes by Huseyin Avni Lifij, Turkish Impressionist painter.

NSA propaganda posters.

Photographs by German photographer Aura Hertwig.