The Cascade County Courthouse in Great Falls, Montana is a historic courthouse built in 1901–1903, located in the town's civic district. Founded in 1887, Cascade County conducted its business from several office buildings in town until the courthouse was built. The full city block site was purchased in 1891 at a cost of $20,000, but there was not enough tax revenue for the county to build a courthouse until a decade later. The grey sandstone used in construction was quarried within six miles of the building. A stone dome had been planned, but a copper dome was built instead. It is crowned by a 14-foot statue of Justice. The dome was used during World War II as a lookout for Japanese aircraft.