left the world at the height of his secular career, and in 750 built a monastery at Fanano, a place given to him by Aistulf, King of the Lombards, who had married Anselm's sister Gisaltruda.
Pepin received his guest at Ponthion, and promised to do all in his power to recover the Exarchate of Ravenna and the other districts seized by Aistulf.
The date of Peter's reign is unknown, but has been hypothesised as following that of Aistulf or Anselm in 756 or 751 and lasted until the Siege of Pavia.