Title: The Smithsonian Castle and the Seneca Quarry
Subjects: History, Public buildings, Design and construction, Sandstone, Quarries and quarrying, Buildings, structures, Smithsonian Institution Building (Washington, D.C.), Washington (d.c.), buildings, structures, etc., Public buildings, united states, Seneca Quarry
Places: Washington (D.C.), Seneca Quarry, Maryland, Seneca, Seneca (Md.)
Time periods: 19th century