Mary Callery sculpture, Children at Play. Mary Callery (June 19, 1903-February 12, 1977) was an American artist known for her Modern and Abstract Expressionist sculpture. She was part of the New York School art movement of the 1940s, 1950s and 1960s. It is said she wove linear figures of acrobats and dancers, as slim as spaghetti and as flexible as India rubber, into openwork bronze and steel forms.