Over 1,000 arias and ensembles, indexed by title, opera, language, composer, voice type, range, keyword, and whether there is a translation or text available. The database includes the complete operatic arias of Berlioz, Mozart, Puccini, Verdi, and Wagner, as well as selections by more than 40 other composers. There is also a database of opera characters.

The full record of the activities of the Metropolitan Opera. This searchable database contains comprehensive information on all Met performances and performers, both in-house and on tour, up to the latest night's offering.

A database of opera performances worldwide in over 600 theaters since 1996. Searchable by keyword (name, city, company) and browseable alphabetically (with numerous display options) or via clickable maps. Entries feature full details on each house, including contact and booking information, accessibility, neighboring venues, a link to the house's Web site, and details on current, past, and future seasons.