▁Pl ague ▁around ▁ 5 4 7 , ▁the ▁expansion ▁res umed . ▁By ▁the ▁time ▁Corn wall ▁was ▁sub j ug ated ▁by ▁W esse x ▁at ▁H ing ston ▁Down ▁in ▁ 8 3 8 , ▁however , ▁it ▁was ▁largely ▁left ▁to ▁its ▁native ▁people ▁and ▁practices ▁which ▁remained ▁inher ently ▁Christian ▁in ▁character ▁and ▁St ▁Pir an ' s ▁Or atory ▁is ▁dated ▁to ▁the ▁ 6 th ▁century ▁ ▁making ▁it ▁one ▁of ▁the ▁oldest ▁ext ant ▁Christian ▁sites ▁in ▁Britain . ▁ ▁Ang lo - S ax ons ▁ ▁In ▁comparison ▁to ▁its ▁un inter rupted ▁continu ity ▁in ▁the ▁cult ur ally ▁Brit ton ic ▁west ▁Christian ity , ▁which ▁was ▁ex ting u ished ▁with ▁the ▁arrival ▁of ▁the ▁Sax ons ▁in ▁the ▁east , ▁was ▁re int rodu ced ▁again ▁to ▁eastern ▁Britain ▁by ▁the ▁Greg or ian ▁Mission , ▁. ▁Est ab lish ing ▁his ▁arch di oc ese ▁at ▁Can ter bury , ▁St   August ine ▁failed ▁to ▁establish ▁his ▁authority ▁over ▁the ▁Wel sh ▁church ▁at ▁Ch ester ▁but ▁his ▁mission — with ▁help ▁from ▁Scottish ▁mission aries ▁such ▁as ▁SS   A idan ▁and ▁C uth bert — pro ved ▁successful ▁in ▁Kent ▁and ▁then ▁North umb ria : ▁the ▁two ▁provinces ▁of ▁the ▁English ▁church ▁continue ▁to ▁be ▁led ▁from ▁the ▁c athed r als ▁of ▁Can ter bury ▁and ▁York ▁(   7 3 5 ). ▁O wing ▁to ▁the ▁importance ▁of ▁the ▁Scottish ▁miss ions ,