Americus, the county seat of Georgia's Sumter County, is probably best known for being the headquarters of Habitat for Humanity International, an organization that pools labor and resources to build homes for those in need and at no profit. The organization sprang from an earlier Christian farming cooperative called Koinonia Partners. In 2007, a mile-wide tornado struck Americus and its surrounding area, destroying about 100 homes and damaging 400 others and causing serious damage to Sumter Medical Center. The storm did not damage the historic Windsor Hotel, built in 1892.