▁have ▁not ▁generally ▁been ▁accepted . ▁Of ▁the ▁several ▁people ▁with ▁that ▁name ▁( P et rus ) ▁that ▁have ▁been ▁suggested , ▁the ▁common est ▁are ▁Pet rus ▁Cant or ▁( d ied ▁ 1 1 9 7 ), ▁a ▁the olog ian ▁and ▁a ▁Pet rus , ▁who ▁was ▁Su cc ent or ▁at ▁Notre ▁D ame ▁ca . ▁ 1 2 0 7 – 1 2 3 8 . ▁Of ▁these ▁two , ▁Pet rus ▁Su cc ent or ▁has ▁been ▁suggested ▁as ▁more ▁probable , ▁in ▁part ▁on ▁chron ological ▁grounds , ▁and ▁partly ▁because ▁of ▁the ▁succ ent or ' s ▁role ▁in ▁over see ing ▁the ▁celebr ation ▁of ▁the ▁lit ur gy ▁in ▁the ▁c athedral ▁( wh ose ▁cho ir ▁was ▁dedicated ▁ 1 1 8 2 ), ▁but ▁this ▁is ▁purely ▁spec ulative , ▁rest ing ▁on ▁an ▁assumption ▁that ▁the ▁composer ▁held ▁some ▁important ▁rank ▁in ▁the ▁c athedral ▁hierarchy . ▁ ▁P é rot in ▁is ▁considered ▁to ▁be ▁the ▁most ▁important ▁member ▁of ▁the ▁Notre ▁D ame ▁school ▁of ▁poly phony , ▁a ▁group ▁of ▁compos ers ▁working ▁at ▁or ▁near ▁the ▁c athedral ▁in ▁Paris ▁from ▁about ▁ 1 1 6 0 ▁to ▁ 1 2 5 0 , ▁cre ators ▁of ▁the ▁ar s ▁anti qua ▁style . ▁The ▁dates ▁of ▁P é rot in ' s ▁life ▁and ▁works ▁have ▁long ▁been ▁a ▁subject ▁of ▁debate , ▁but ▁are ▁generally ▁thought ▁to ▁be ▁from ▁about ▁ 1 1