The Dexter Building was a landmark building located at 630 South Wabash Avenue, in the South Loop area of Chicago, Illinois. The building was designed by the firm of Dankmar Adler and Louis Sullivan, and built in 1887. Prior to the large fire that led to its destruction in 2006, it was one of the earliest surviving Louis Sullivan buildings, and was considered a precursor of the nearby Auditorium Building.

The building was commissioned by Wirt Dexter, a Chicago attorney and real estate developer. Originally it was used as a factory and showroom for the R. Deimel & Brothers furniture manufacturing firm. From 1967 it was the home of the George Diamond Steak House, and the upper floors later housed the Sawyer Secretarial College. (wikipedia.org)