Day and Night, 1937 Woodcut printed from two blocks National Gallery of Art, Washington Cornelius Van S. Roosevelt Collection, 1974 © Cordon Art - Baarn - the Netherlands. All rights reserved. This is one of Escher's first prints to show the influence of Moorish mosaics, with their abstract, positive-negative geometric shapes. With day and night landscapes as mirror images, the white birds merge to form a daylight sky at left, while at right the black birds blend to create a night sky.