Mission and Church-Building
After his ordination, Julius and the deacon Julian devoted themselves to preaching the Gospel and baptizing among those who had not yet received the faith. The Western tradition centers his later mission on the Lake Orta region in the Novarese highlands of northern Italy.
By tradition, Julius and Julian were ordered by the Emperor Theodosius I to demolish pagan altars and sacred groves and to raise Christian churches in their place. They are said to have built one hundred churches in all: Julian's ninety-ninth at Gozzano, dedicated to Saint Lawrence, where he was later buried, and Julius's hundredth on his island in Lake Orta, dedicated to Saints Peter and Paul. Because the earliest account of these deeds dates only from the eighth century and mixes legendary with historical material, the church-building tradition is best regarded as pious tradition rather than verified history.
Recent archaeological discoveries in the former parish church of Saint Lawrence (S. Lorenzo) at Gozzano confirm that Julius and Julian existed as distinct historical individuals, even where the details of their vita remain legendary.