 It developed between about 1870 and 1942, and includes notable examples of Italianate, Romanesque, and Classical Revival style architecture.Located in the district is the separately listed Grant County Jail and Sheriff's Residence.Other notable buildings are the Grant County Courthouse (1881-1883), Marion Bank Building (c. 1917), Iroquois Building (c. 1895), Dan-Mar Apartments (c. 1900), United Telephone Block (c. 1903), Cecelian Apartments (c. 1915), Marion Post Office (c. 1942), and William Smith Building / Mecca Club (c. 1917).