23 Beekman Place, also the Paul Rudolph Apartment & Penthouse, is an apartment building between 50th and 51st streets in the Turtle Bay neighborhood of Manhattan in New York City. Built c. 1869 as a five-story brownstone residence, it was substantially redesigned in the late 20th century by Paul Rudolph, an American architect and one-time dean of Yale University. It is one of the few known projects Rudolph designed in the city.