Page 1 of Tractatus de Modo Offerendi Venerabiliam Eucharistiam (Treatise on the recent treatment of the most venerable offering of the Eucharist.)
Manuscript compiled with Tractatus de Poenitentia (Treatise on Repentance.), both authored by Leonardo de Utino, O.P. (ca. 1400-ca. 1470). Utino was reportedly a popular priest both north and south of the Italian Alps. Both treatises were written by Fr. Utino in Erfurt on May 22, 1445.