REPUBLIC THEATER · 207 W. 42nd Street. Architect: J. B. McElfatrick & Co. Opening. September 27, 1900; Sag Harbor. After building the Victoria Th eater on the corner of 42nd Street and Seventh Avenue, Oscar Hammerstein I built the Republic next door on 42nd Street. Th e Republic thus became the ﬁ rst theater built on 42nd Street. Th e Republic and Victoria share the same roof and on it Hammerstein built the Paradise Garden.