Published Wednesday, March 13, 2019
On March 1, 2019 the 10,000th document was added to the APT Building Technology Heritage Library, a free on-line archive of period architectural trade catalogs, house plans books, and technical building literature. The Building Technology Heritage Library (BTHL) is a project of the Association for Preservation Technology (APT) and is hosted by the Internet more»
Published Thursday, March 7, 2019

September 7-12, 2020
Göttingen & Kassel

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