The Citineu (alternatively spelled City neu or City-neu) motif is one that Vasarely, known as the father of Op Art, returned to over several decades, starting in the 1960s and culminating in City Neu, his 1984 commission for UNESCO’s headquarters in Paris, a painting that is over 26 feet wide. The motif, which Vasarely also used in Prototype du No 1200 Citineu, evokes architectural forms that function in illusory space to create entire worlds. The viewer’s eye seems to move into and then back out of depth, constantly looping around in perceived space that appears to be three-dimensional even though depicted on a two-dimensional canvas.