The word “Mahzor,” means “cycle" and is familiar to most Jews as the term used for the prayer book for the High Holidays and festivals. However, in medieval times, the term Mahzor was used to refer to prayerbooks that contained the complete cycle of prayers for the entire year.

The Bamberg Mahzor, completed in Bamberg, Germany, in 1279, includes prayers for the entire year according to Ashkenazi custom. It is distinguished by its Ashkenazi script and the style of its decoration. 

On this page you can see the word “Kol,” the first word of the “Kol Nidre” formula that begins the service for Yom Kippur. The word is typically decorated for this manuscript. 

In other hands in the margins are notes by later users concerning the proper recitation of Kol Nidre.