Mount Pleasant is a neighborhood in the northwestern quadrant of Washington, D.C. It is bounded by Rock Creek Park to the north and west; Harvard Street NW to the south; and 16th Street NW to the east. It is north of Adams Morgan and west of Columbia Heights. It is home to about 10,000 people. The western four-fifths of the neighborhood is a largely wooded residential enclave bounded on two sides by Rock Creek Park, just east of the National Zoo. Structures in this area are primarily row houses of Neoclassical architecture with rear porches, with some subdivided into multiple apartments. The Eighteen Hundred Block Park Road, NW is notable for its 10 detached "suburban" houses on terraces overlooking the street. The 12 buildings at 1644–1666 Park Road NW, designed by Appleton P. Clark Jr. in the style of Colonial Revival architecture, were completed in 1906. The eastern side of the neighborhood, along 16th Street NW and Mount Pleasant Street, is marked by mid-rise apartment buildings. These buildings offer rental apartments, condominiums and housing cooperatives. A four-block commercial corridor with convenience shopping extends along Mount Pleasant Street. It is also walking distance from larger retail developments in Columbia Heights. The neighborhood is served by the Mount Pleasant Line and the Crosstown Line buses. A series of "Heritage Trail" historical markers are installed in Mount Pleasant. The markers, which may be followed as a walking tour, consist of 17 poster-sized street signs featuring narrative, photographs and maps. History In 1727, Charles Calvert, 5th Baron Baltimore, then governor of the Province of Maryland, awarded a land grant for present-day Mount Pleasant to James Holmead. This estate included the territory of present-day Adams Morgan, Columbia Heights, and Pleasant Plains neighborhoods. James's son, Anthony, inherited the estate in 1750 and named it Pleasant Plains. After the United States Congress created the District of Columbia in 1791, Pleasant Plains estate became part of Washington County, a section of the District lying between what now is Florida Avenue and the Maryland border. The Holmeads gradually sold off all tracts of the Pleasant Plains estate. In 1794 and 1796, Robert Peter, Georgetown's pioneer businessman, conducted title descriptions. He created maps for tracts of some of his land in Mount Pleasant for transactions with commissioners of the city. In 1861, William Selden, Treasurer of the United States from 1839 to 1850, owned of land north of Pierce Mill