The Mahzor of Worms is a thirteenth century illuminated manuscript. Dated to 1272, it is a Mahzor, a Jewish festival liturgical prayerbook, and the locus of the first written Yiddish. The scribe who copied the manuscript was Simhah ben Yehuda Ha-Sofer and it was illustrated by Shemiah Ha-Zarfati.
The first volume was completed likely in Würzburg. The second volume was produced at a later time, probably in Worms, where the two volumes were used by the local Jewish community.
References
External links Machzor Worms in the catalog of the National Library of Israel, including a full scan.