This is 817 Broadway (at E. 12th) in Manhattan. It used to be known as the Sprague building and was designed by George Post. It sits catty-corner from the splendid Strand bookstore (“18 miles of books”). This site has more photos and some history about the building. (I’d like to learn more about that “Fuller Detective Agency” shown in the 1905 photo).

817 Broadway “The Sprague Building”