League of Historic American TheatersA resource for people involved in restoration efforts of theaters of all types, nationwide. LHAT provides consulting services, maintains resource lists of people in various specialties related to theater restoration, advocates on behalf of historic theater preservation, hosts conferences and seminars on restoring and operating historic theaters, and serves as a national network for interested individuals.
Theater Historical Society of America
The society has, for over 30 years, been dedicated to the collection of archival material documenting more than 9,000 theaters nationwide. Their materials are open to the public and an invaluable resource for preservationists.