Klein Department Store, ca. 1984.

S. Klein On The Square was department store whose flagship location sat in two buildings on the corner of 14th Street and Union Square East. Considered a more affordable option to stores such as Macy's and A&S, Klein still offered a furniture department, fur salon, and a full service pet department. The original store (at 14th Street) opened in either 1905 (as stated in the founder's obituary) or by 1912 (as noted in the Landmarks Preservation Commission's East 17th Street/Irving Place Historic District Designation Report). The store expanded in 1930 to include the former Union Square Hotel building at the southeast of 15th Street (out of frame at left).

During the 1960s the business expanded opening stores in New Jersey, Maryland, and Virginia. By the late 1970s the parent company of the store began closing the locations en masse and selling off the property, including the flagship location, which closed in 1975. The building was demolished in the mid 1980s for the 1987-completed, Zeckendorf Towers apartment complex.