What is The Museum of Modern Art? For some it is a cherished sanctuary, for others an idea concretized through the art it has collected and exhibited, and for others still an educational laboratory where challenging and difficult art is confronted, measured, and understood. Founded in 1929 in small temporary quarters at 730 Fifth Avenue and now housed in a building that occupies almost half a city block at 11 West 53rd Street, The Museum of Modern Art, New York is on the cusp of a massive renovation and expansion that will see it into the 21st century.The Museum is a repository of masterpieces of modern and contemporary art, 325 of the best of which are reproduced here, accompanied by short, incisive, and intelligent texts