pts ▁and ▁the ▁outer ▁walls ▁of ▁the ▁ch an cel ▁date ▁back ▁to ▁ 1 2 6 0 , ▁and ▁that ▁the ▁to wers ▁were ▁built ▁in ▁im itation ▁of ▁those ▁at ▁Ex eter . ▁ ▁St ▁Mary ' s ▁College ▁ ▁In ▁ 1 3 3 5 ▁John ▁Grand isson , ▁Bishop ▁of ▁Ex eter , ▁bought ▁the ▁man or ▁and ▁adv ow son ▁from ▁Rou en ▁and ▁on ▁ 2 2 ▁January ▁ 1 3 3 8 ▁established ▁a ▁colleg iate ▁foundation ▁with ▁forty ▁members . ▁He ▁re built ▁much ▁of ▁the ▁church , ▁and ▁the ▁present ▁nave , ▁ch an cel , ▁a is les ▁and ▁Lady ▁chap el ▁date ▁from ▁this ▁time . ▁The ▁nave ▁is ▁of ▁five ▁b ays , ▁and ▁the ▁ch an cel , ▁unus ually ▁long ▁in ▁proportion , ▁ ▁is ▁of ▁six , ▁with ▁vest ry ▁chap els ▁to ▁ ▁north ▁and ▁south . ▁ ▁The ▁church ▁is ▁noted ▁ ▁for ▁its ▁painted ▁roof ▁and ▁early ▁six teenth - century ▁fan ▁v ault ed ▁a is le , ▁the ▁Dor set ▁A is le , ▁designed ▁and ▁commission ed ▁by ▁Cec ily ▁Bon ville , ▁ 7 th ▁Baron ess ▁Har ington , ▁whose ▁first ▁husband ▁was ▁Thomas ▁Grey , ▁ 1 st ▁Mar qu ess ▁of ▁Dor set . ▁The ▁church ▁has ▁ten ▁miser ic ords ▁d ating ▁from ▁the ▁building ▁of ▁the ▁church ▁in ▁ 1 3 5 0 , ▁five ▁showing ▁the ▁arms ▁of ▁Bishop ▁John ▁de ▁Grand isson . ▁The