Excelsior Museum and Cultural Center is an African-American history museum in St. Augustine, Florida. It is located at 102 Martin Luther King Avenue and open Tuesday through Thursday from 12 p.m. until 5 p.m. It is housed in the Excelsior School building, St. Augustine's first black public high school. The museum opened in 2005. Exhibitions include the history of Lincolnville, founded as a cluster of plantation squatter shacks that eventually became an area of Victorian homes.