William of Modena, also known as "William of Sabina", "Guglielmo de Chartreaux", "Guglielmo de Savoy", "Guillelmus" (c. 1184 - March 31 1251), was an Italian clergyman and papal diplomat. He was frequently appointed a legate, or papal ambassador by the popes Honorius III and Gregory IX, especially in Livonia in the 1220s and in the Prussian questions of the 1240s. Eventually he resigned his see to devote himself to these diplomatic issues. Wikipedia
In 1225 the Pope had sent his Italian vice-chancellor, Bishop William Of Modena, to arbitrate the dispute in Livonia. www.the-orb.net/encyclop/religion/crusades/cruurban.html
The definitive Wikipedia entry for William Of Modena. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/William_of_Modena
