[2] In 708 Aubert had a vision in which the Archangel Michael instructed him to build an oratory on the rocky tidal island at the mouth of the Couesnon.

At last in exasperation Michael appeared to him again, this time poking him in his head and ordering him to complete the task.

[5] The relic of Aubert's skull, complete with hole where the archangel's finger pierced it, can still be seen at the Saint-Gervais Basilica in Avranches.

Skeptics suggest that the skull is in fact a historic relic showing evidence of trepanation.

[6] Aubert is regarded as a saint in the Roman Catholic Church, with a feast day of 10 September.