It is not clear what the character of Clarus' dwelling near Marmoutier was. It seems it was a sort of hermitage (tabernaculum, literally "a tent"), although not a solitary one: Clarus was accompanied by a group of fellow monks.
Martin established his monastery at Marmoutier shortly after his election to the bishopric of Tours in 371. Thus, Clarus must have settled near Marmoutier in the 70s or 80s of the 4th century.