Grajewski, Czesław (Wyższe Seminaria Duchowne Towarzystwa Salezjańskiego, 2020)
The author analyzes “Gratulemur in honore” ‒ an office on St. Catherine of Alexandria. The author proved that this is an endemic work, created in the 13th century in Liege or the surrounding areas. It did not, however, spread in Europe. In Poland the only code that includes this (incomplete) office is “Pontificale Plocense”, probably also created in 12th c. in Liege, which reached Poland already in the 13th century. The liturgical books used in the Diocese of Płock (in the 15th and 16th centuries) contain only one antiphon from the “Gratulemur” office.
