Database for Broadway theatre information. IBDB provides records of productions from the beginnings of New York theatre until today. Details include pertinent people involved as well as interesting facts and production statistics.
Lortel Archives database: Off-Broadway refers to any production that has satisfied the following requirements:
1. Played at a Manhattan theatre with a seating capacity of 100-499
2. Intended to run a closed-ended or open-ended schedule of performances of more than one week
3. Offered itself to critics and general audiences alike