Italian Opera and Theater
Arena di Verona
- (IT)
Aria Database
- by Robert Glaubitz.
Gran Teatro La Fenice
- (IT)
Karen Mercedes Opera SIte
Metropolitan Opera
Metropolitan Opera Guild
Michael Black's Opera House
Musical Theatre in Europe
- Opera Houses from Aachen to Zwickau.
New Grove Dictionary of Opera
New York Times Opera Reviews
Online Opera Scores
- Indiana University Bloomington
Opera 2000
- Opera events in Greece.
Opera Links
Opera Plus
- (BE)
Opera Rara
Operabase
OperaData
- suppliers of data to Opera Now magazine.
OperadiO
- download the free player and listen to opera 24 hours a day.
OperaGlass
- at Stanford.edu..
OperaWeb
- (IT)
Operissimo
- database of performers, composers, operas, and opera houses.
Public Domain Opera Libretti
- and other vocal texts.
San Francisco Opera
Sleeping Opera Tree
Teatro alla Scala - Milan
Teatro Comunale di Bologna
- (IT)
Teatro Ventidio. Basso - Ascoli Piceno
- (IT)
Vincenzo Bellini
Virtual Opera House
Voice Definitions and Ranges