Given the question: Facts: - imagesize: 220px - venerated in: roman catholic church , orthodox catholic church - caption: saint aubert 's skull at the saint-gervais basilica - feast day: 10 september - death date: 720 ad - major shrine: church of s gervais in avranches - name: saint aubert - image: normandie manche avranches5 tango7174.jpg Based on these bullet points, write a short biography describing the life of aubert of avranches .
The answer is:
saint aubert , also known as saint autbert , was bishop of avranches in the 8th century and is credited with founding mont saint-michel .