National Preservation Orgs
National Trust for Historic Preservation
NPS Technical Preservation Services
(Sec. of the Interior’s Standards, Preservation Briefs, Tax incentive info)
The Association for Preservation Technology International (APT)
American Council on Historic Preservation
Library of Congress (Sanborn maps, HABS/HAER collection)
NPS National Register of Historic Places official site
Other Preservation and Historical Orgs of Interest
Historical Society of Washington, D.C.
Maryland Historical Society
White House Historical Association
Society of Architectural Historians
Recent Past Preservation Network
Preservation Society of Charleston (SC)
My Classmate Kate!
The Globe-Trotting Building Hugger
My Graduate School!