"The Maryland Zoo in Baltimore" — formerly known as "The Baltimore City Zoo" or the "Baltimore Zoo" — is located in historic Druid Hill Park in the northwestern area of the City of Baltimore, Maryland, (U.S.A.), with the postal address of 1876 Mansion House Drive. Druid Hill was opened in 1860 as the first major park purchase by the City under foreseeing Mayor Thomas Swann (1809-1883), (and later Governor of Maryland) and was later designed by famed nationally-known landscaper Frederick Law Olmsted (1822-1903), with additional work on various park buildings contributed by future Baltimore City Hall architect George A. Frederick (1842-1924), and Park Commissioner John H.B. Latrobe (son of earlier famed British-American architect Benjamin Henry Latrobe [1764-1820]), who also was an accomplished lawyer, author, artist, amateur architect and civic leader.