![The Introit Gaudeamus omnes, scripted in square notation in the 14th–15th century Graduale Aboense, honors Henry, patron saint of Finland.](http://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Graduale_Aboense_2.jpg/275px-Graduale_Aboense_2.jpg)
Gregorian chant is the central tradition of Western plainchant, a form of monophonic, unaccompanied sacred song of the Roman Catholic Church.
Credit: Turku |
Gregorian chant is the central tradition of Western plainchant, a form of monophonic, unaccompanied sacred song of the Roman Catholic Church.