Views of American towns and cities and representations of historical events, scenes, places, and battles relating to the United States, from 1497 to 1899.
Acceso libre y gratuito a las principales obras de la Biblioteca Nacional. Un ambicioso proyecto que pone a disposición de todos, un amplio conjunto de obras patrimonio bibliográfico español.
A free, publicly searchable Internet database of architectural and historical information and images for 35,000+ structures, mostly in Philadelphia, Bucks, Chester, Delaware and Montgomery Counties, including all those on the Philadelphia Historical Commission list of significant buildings, and the Pennsylvania Historical & Museum Commission’s inventory of historic structures