Saint Julian, Bishop of Cenomanis, was elevated to bishop by the Apostle Peter. Some believe that he is the same person as Simon the Leper (Mark 14:3), receiving the name Julian in Baptism.

The Apostle Peter sent St Julian to preach the Gospel in Gaul. He arrived in Cenomanis (the region of the River Po in the north of present day Italy) and settled into a small hut out beyond a city (probably Cremona), and he began to preach among the pagans. The idol-worshippers at first listened to him with distrust, but the preaching of the saint was accompanied by great wonders. By prayer St Julian healed many of the sick. Gradually, a great multitude of people began to flock to him, asking for help. In healing bodily infirmities, St Julian healed also the souls, enlightening those coming to him by the light of faith in Christ.

In order to quench the thirst of his numerous visitors, St Julian, having prayed to the Lord, struck his staff on the ground, and from that dry place there came forth a spring of water. This wonder converted many pagans to Christianity. One time the holy bishop wanted to see the local prince. At the gate of the prince's dwelling there sat a blind man whom St Julian pitied, and having prayed, gave him his sight. The prince came out towards the holy bishop, and having only just learned that he had worked this miracle, he fell down at the feet of the bishop, requesting Baptism. Having catechized the prince and his family, St Julian imposed on them a three-day fast, and then he baptized them.

On the example of the prince, the majority of his subjects also converted to Christ. The prince donated his own home to the bishop to build a temple in it, and he provided the Church with means. St Julian fervently concerned himself with the spiritual enlightenment of his flock, and he healed the sick as before. Deeply affected by the grief of parents, the holy bishop prayed that God would restore their dead children to life. The holy Bishop Julian remained long on his throne, teaching his flock the way to Heaven. The holy bishop died in extreme old age. To the end of his days he preached about Christ and he completely eradicated idolatry in the land of Cenomanis.