Musica antica
- Aliamusica
Musica antica in Italia: Medioevo, Rinascimento, Barocco
http://www.aliamusica.net/default.asp - Canto Ambrosiano
il sito della Schola Gregoriana Mediolanensis
http://www.cantoambrosiano.com/default.htm - Cantus
A database for latin ecclesiastical chant
http://publish.uwo.ca/~cantus - Center for the history of music theory and literaure
www.music.indiana.edu/chmtl/ - Notitiae Cantus
An International Newsletter for Gregorian Chant and other Repertoires of Western Chant
http://www.wu-wien.ac.at/earlym-l/Notitiae.Cantus/