Associated internet pages
- Hungarian Chant Database (HCD) (Gábor Kiss, Institute of Musicology, Budapest)
- Regensburg´s data pool for research on Gregorian chant (David Hiley, University of Regensburg)
- CANTUS Database (Debra Lacoste, University of Waterloo, Canada)
- Cantus Index: Catalogue of Chant Texts and Melodies (Debra Lacoste, Jan Koláček)
- Portuguese Early Music Database (Manuel Pedro Ferreira, Lisboa, Portugal)
- Slovakian Early Music Database (Eva Veselovská, Bratislava, Slovakia)
- Fontes Cantus Bohemiae (Jan Koláček, David Eben, Praha, Czech republic)
- Cantus Planus in Polonia (Bartosz Izbicki, Warszawa, Poland)
- Manuscriptorium. Digital Library of Written Cultural Heritage (National Library of the Czech Republic)
- Musikalische Quellen des Mittelalters in der ÖNB (Robert Klugseder, Österreichische Akademie der Wissenschaften)
- CEEC - Codices Electronici Ecclesiae Coloniensis
- e-codices. Virtual Manuscript Library Switzerland (Christoph Flüeler, Universität Freiburg)
- La Trobe University Medieval Music Database (La Trobe University)
- Münchener DigitalisierungsZentrum, Digitale Bibliothek
- Usuarium. A Digital Library and Database of Latin Liturgical History (Miklós István Földváry, Eötvös Loránd University, Budapest)
- Digital Image Archive of Medieval Music (Margaret Bent, Andrew Wathey)