Each of the resources listed here hold collections of material dealing with topics of drama, theatre, music or performing arts. Theatre, as with all of the arts, is inter-disciplinary by nature. It is therefore advisable to consider looking at specific disciplinary resources (e.g. Literature, History, Psychology, etc.) for your topic in addition to the ones listed below.
Multidisciplinary databases contain resources from a variety of different academic subjects, often including Arts,Humanities, Social Sciences, and Physical Sciences. While these are excellent for use of topics that cross over two or more disciplines, take care with analyzing the materials you discover as there are magazine, newspaper, and trade publications included with scholarly articles.