1898 At age 15, Peter left high school and began to study the trade of a mosaic worker at the Cooper’s Union Academy in Art and Drawing. Peter studied by night and worked by day with his three uncles, Constante, Valentino and Vincenzo — all skilled in the crafts of marble, terrazzo, mosaic and decorative plaster. In the years that followed he worked, not just in New York, but all over the United States.