to provide a dignity and benefice for Sixtus either in Zagreb or other cathedrals, or perhaps in a church of the Archdiocese of Esztergom, because he "wants to leave" his position of archdeacon in Komárom (probably due to its extensive administrative obligations). After 1266, Sixtus returned to his office of lector in Esztergom. In August 1271, after Ottokar II of Bohemia invaded the lands north of the Danube and destroyed the archives of the Diocese of Nyitra (Nitra), vice-ispán Michael, Benedict, provost of Arad and Sixtus were mandated by King Stephen V to determine the borders of the diocese, cataloging its estates and churches upon the request of Bishop Vincent. In early 1272, Sixtus appeared as an ad litem judge to investigate the credibility of the udvarnik lands countrywide. In this capacity, he traveled the counties of Veszprém, Zala, Somogy and Vas. He last appears in contemporary sources on 17 April 1285. A certain Cyprian succeeded him as lector of Esztergom by 15 August 1286, suggesting Sixtus was deceased by then. In 1287, he is referred to as of "good memory" (bone memorie). Sixtus made his last will and testament in 1272, along with cantor Valentine. Accordingly, his gifted lands in Hetény was inherited by the Archdiocese of Esztergom. Sixtus stipulated that the archbishop had to finish the construction of the St. Anne monastery in the area. The monastery later belonged to the Williamites. Diplomatic missions Both Urban IV in 1264 and Charles of Sicily in 1270 referred to Sixtus as a "royal cleric", which connected his diplomatic activity. At first, he was sent to Italy in 1258 to represent King Béla's interests at the Roman Curia, as some of his policies gave rise to many conflicts between the Hungarian royal court and the Holy See after the Mongol invasion. Sixtus sold some part of his inherited land in Hetény to his relative and neighbour Mikó Szécs, in order to finance his diplomatic mission to Rome. He stayed there as the permanent ambassador of the Kingdom of Hungary to the Papal States until 1264. For instance, Sixtus protested in the name of his king when Pope Urban IV appointed Timothy as Bishop of Zagreb without Béla's consultation in late 1263. At the same time, the king was angered by the fact too that Pope Urban allowed his opponent Cardinal Báncsa to be free to distribute Timothy's benefices in Hungary among