The Museum of Fine Arts, Houston, hosts the largest and most comprehensive exhibition of works by M.C. Escher ever presented. Spanning Escher’s entire career, Virtual Realities is drawn from the most extensive Escher collection in the world, held by Michael S. Sachs, who acquired 90 percent of the Escher estate in 1980. The artist’s singular, sometimes unsettling works, with their orchestration of multi-dimensional alternate realities, have become icons of the 20th century.