IBDB : Internet Broadway Database
“IBDB was created by the Research Department of The Broadway League, the national trade association for Broadway. The League has collected relevant Broadway information and statistics for many years. In 1996, the Research Department began to organize and expand the League’s data collection in order to produce a website that would serve as a comprehensive history of Broadway for the benefit of League members, press, theatre professionals and enthusiasts. … IBDB provides a comprehensive database of shows produced on Broadway, including all “title page” information about each production. IBDB also offers historical information about theatres and various statistics and fun facts related to Broadway.”–From the website.