Escher Exhibition in Lisbon

LISBON, PORTUGAL - MARCH 30: A visitor at the Museu de Arte Popular passes by an interactive exercise as part of Dutch artist Maurits Cornelis Escher exhibition on March 30, 2018 in Lisbon, Portugal. This exhibition presents the works of Escher, one of the world's most famous graphic artists, featuring over 160 original works starting with his early prints and realistic drawings, and exploring his work on tessellation and transformation of shapes illustrating how metamorphosis became a unique feature of his art, blending fantasy and geometry. (Photo by Horacio Villalobos - Corbis/Corbis via Getty Images)