Charleston County Courthouse (1790–92) is a Neoclassical building in Charleston, South Carolina, designed by Irish architect James Hoban. It was a likely model for Hoban's most famous building, the U.S. White House, and both buildings are modeled after Leinster House, the current seat of the Irish Parliament in Dublin. In 1883–1884, the courthouse underwent a large renovation performed by Kerrigan & Grant.