History - Rector potens verax Deus (In festis BMV)
Oct 26, 2026 (xmarteo)
Added usage. Added source (Liber Antiphonarius & Liber Usualis, where the rubric is that this tone is used at all hours)
office-part
hy
sources
[{"chant_id":"19873","source":"3","page":"1256","sequence":"5","extent":"1"},{"chant_id":"19873","source":"48","page":"[124]","sequence":"5","extent":"1"}]
version
Solesmes 1960