The word “Mahzor,” familiar to most Jews as the term used for the prayer book for the High Holidays, means “cycle.” It can therefore be used to describe a book containing any liturgical cycle. Sometimes the term was also used to describe a text created in codex = book form, as opposed to a traditional Jewish scroll.  

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.