Round Rockbr/Williamson County, Texasbr/30 30.531' N 97 40.718' Wbr/102 E. Main Avenue. br/br/Text: Erected 1879, three years after Round Rock expansion began at railroad's arrival. Some successive tenants included stores, physician, restaurants. After it was gutted by fire in 1963, architect Martin S. Kermacy and wife, Evelyn, built a modern interior within the Victorian Italianate walls.