The Fourth Avenue Historic District is a historic district in downtownPittsburgh, Pennsylvania, United States. The district was the center of finance and banks for the city during the decades surrounding the turn of the 20th Century. Many ornate structures still exist from that era, including the location of the Pittsburgh Stock Exchange on the corner of Fourth Avenue and Smithfield Street from 1864-1903, the now vacant lot of its location at 229 Fourth Avenue from 1903 to 1962 and the still standing structure of the Exchange from 1962 until it closed in 1974. It is roughly bounded by Smithfield Street, Third Avenue, Market Square Place, and Fifth Avenue. The period of significance for the District is from 1871 (when the initial phase of the Dollar Bank building construction was finished) to 1934 (50 years before preparation of the nomination to the NRHP).