National Park Service
Technical Preservation Services photo of the Johnson Wax building designed by Frank Lloyd Wright
illustration of roof - courtesy The Athenaeum of Philadelphia
Roofing for Historic Buildings  »
An online guide to the history of roofing technology.

photo alt text
Recent Past Initiative  »
Information about preserving and rehabilitating twentieth century architecture.
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In addition to published information and online education materials, TPS organizes and produces a variety of other programs related to historic preservation, tax incentives, and historic architecture.
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