 Complete the following phrase:  The Archdiocese owes its foundation to Jogaila, who Christened Lithuania in 1387 and sent Dobrogost, Bishop of Poznań as ambassador to the Pope Urban VI with a petition for the erection of an episcopal see at Vilnius and the appointment of Andrzej Wasilko former bishop of Siret and confessor of Elisabeth of Hungary to fill it. This was granted and the foundation of a collegiate church of ten canons authorized. Under Wasilkos rule, the churches of Saint John, that became the parish church of the city, as well as of Saint Martin and Saint Anne in the Upper and the Lower Castle, respectively were erected in Vilnius. Upon Wasilkos death in 1398, he was succeeded by a Franciscan, Jakub Plichta 13981407, in whose time the Cathedral perished in fire. Among his successors were: Piotr Krakowczyk of Kustynia 14141421, whom Pope Martin V invested with full powers to bring back the Orthodox of Lithuania to the Catholic Church; Matthias of Trakai 14211453, a Lithuanian, who sent representatives to the 