Graduate programs began in 1901, and the school awarded its first doctoral degree in 1921.[10] From 1889 to 1973 the school became known as Polytechnic Institute of Brooklyn. In 1917, the preparatory program separated from the Institute and became the Polytechnic Preparatory Country Day School. Polytechnic Institute moved to its present location in 1957, the former site of the American Safety Razor Company factory, where it became a co-educational institution.