Saint Aubert is a historical figure known for his role as the Bishop of Avranches in the 8th century. He is best recognized for founding the famous Mont Saint-Michel, a small rocky island in Normandy, France, which became a significant pilgrimage site. His life is often associated with the legend of receiving a vision from the Archangel Saint Michael, who instructed him to build a church on the island. The feast day of Saint Aubert is celebrated on May 8, and he is venerated in various Christian traditions. His contributions to the spread of Christianity in the region and his dedication to his faith have made him an important figure in the history of Normandy.