antiphoner contained the choir book of chants sung at the Canonical
Hours. The monks shared these books which were generally large.
Antiphoners were divided according to the days of the week (temporal)
feast days (sanctoral).(8)
Chants that were sung
at the Mass were in the gradual.
The antiphoner featured below dates from c. 1290 and was used
in Cambrai. This manuscript is now in the Walters Gallery.