F.I.S.T - Stallone - Filmed in Dubuque

Stallone's first film after Rocky and arguably one of his most underrated.  Filmed predominately in Dubuque.

From Wikipedia:
Most of the filming was done in Dubuque, Iowa. Dubuque was chosen firstly because the older sections of the town looked more like Cleveland of the 1930s than Cleveland did, and secondly because of the absence of roof-mounted television antennas due to most of the homes having cable television. Because of the large bluffs, over-the-air television signals had problems reaching homes in the low-lying areas, so a cable system was developed in the mid-1950s, which was considerably earlier than many other municipalities.

Some locations used in filming included St. Raphael's Cathedral, Sacred Heart Church, the Fourth Street Elevator, E.J. Voggenthaler Co. and Dubuque Star Brewery. Filming was also done at the former Caradco manufacturing company in Dubuque. Portions of the Caradco building were fitted with new windows which were then purposely smashed for filming. The windows were replaced by the end of filming. Other Dubuque locations that were also visible in the finished film were the Dubuque County Courthouse and Saint Mary's Catholic Church.