Jean Arp, a French-German artist who lived from 1886 to 1966, was also influenced by Plato's theories of sacred geometry in his work. Arp was a pioneer of abstract art, and his sculptures and paintings often emphasized the use of organic, biomorphic shapes. Arp believed that the natural world was characterized by a sense of harmony and balance, and he sought to capture this essence in his art. He saw geometry as a means of expressing the underlying order and unity of the universe, and he used simple, geometric shapes to create abstract compositions that evoked a sense of cosmic harmony.