About the Breviarium Gregorianum Project


Breviarium Gregorianum groups together the Gregorian scores of the Divine Office according to the Catholic Breviary in force in 1962. The scores come mainly from the Liber Antiphonarius and the 1961 Liber Usualis published by the Abbey of Solesmes.

It is still in an early beta, not everything is implemented for the 6 available offices and Matins and Complines are not yet available. Please consider donating if you want to support the development of the project.

Breviarium Gregorianum was designed and coded by myself, Yanis Ouakrim, PhD student. It is mainly aimed for the prayer of the Divine Office at the Collégiale Saint-André in Grenoble by a group of laymen led by Thierry J..

It is a friend project of Vespero Generator that provides vesper booklets for all the main feasts and sundays of the 1960 breviary.

Breviarium Gregorianum relies on other projects namely:

Code base and contributions

I'd rather not open up the code to contributions at this early stage as it would require extra work. If you'd like to help with the development of Breviarium Gregorianum, you can add the missing gregorian pieces to gregobase (especially for lauds and matins) or make a donation to help with the hosting and the development of the project:

If you want to suggest a correction, request a feature: you can consult here the bug and features I've identified and eventually add yours (English or French): Bugs and feature requests.

You can contact me using contact@breviariumgregorianum.com.


Andrew Hinkley is responsible for most of the GABC transcriptions used on this site. Father Matthew coded the exsurge library that displays the songs. Laszlo Kiss created divinum officium, which compiles all the texts of the Divine Office. Benjamin Bloomfield created chant tools for displaying psalm tones and chapters.


You can check out the excellent Compline by Benjamin Bloomfield to pray compline. And you can listen to the traditional office sung on YouTube on the VerbumGloriae channel.