Umhau grave in section M at Prospect Hill Cemetery in Washington, D.C., in the United States in 2014. Prospect Hill Cemetery was added to the Register of Historic Places of the District of Columbia (a listing of historic sites maintained by the city) in 2005. Founded by Concordia Church, a Lutheran congregation comrised of mostly German immigrants, Prospect Hill Cemetery is the place of repose for most of the city's German American immigrant population of the 1800s and early 1900s. It is not uncommon to see grave markers mention a place of birth in Germany or Prussia, or for the German language to be used for epitaphs.