The Lyon Farmhouse, built around 1820 and restored in 2019, is considered one of the oldest remaining homes in Dekalb County, Georgia. Members of the Lyon Family occupied the home until 2007, even though ownership was transferred to the county in 2003. Prior to the end of the Civil War, the slave census records indicated that the Lyon family enslaved 17 people. After the Civil War, the freedmen and women of the Lyon family stayed in the area to start one of the oldest Black communities in the state. The community named Flat Rock served as an important support system to create a thriving community.
Notable descendants of the families who formed Flat Rock are Willie Gault (football player), Chris Tucker (comedian), and Warren Moon (football player).