Directorium chori : ad usum omnium ecclesiarum, tam cathedralium, quam collegiatarum, nuper restitutum, & nunc secundo in lucem editum

Catholic Church, Guidetti, Giovanni, 1532-1592 · 1589 · Romae : Apud Franciscum Coattinum · 22 pictures

Gregorian chants · Service books (Music)

Internet Archive · Boston Public Library · Public domain (published before 1931) · More from this library