▁Roman ▁s arc oph ag us ▁which ▁is ▁thought ▁to ▁be ▁the ▁sep ulture ▁of ▁Con an ▁M éri ade c , ▁first ▁Christian ▁king ▁of ▁Brit t any , ▁who ▁died ▁in ▁ 4 2 1 . ▁ ▁The ▁c ib or ium ▁containing ▁the ▁Holy ▁E uchar ist . ▁It ▁is ▁located ▁above ▁the ▁high ▁alt ar , ▁it ▁has ▁the ▁shape ▁of ▁a ▁pal m ▁tree ▁which ▁tradition ally ▁symbol ised ▁both ▁et ern ity ▁and ▁the ▁res urre ction . ▁There ▁are ▁three ▁similar ▁c ib or iums ▁in ▁France ▁( in ▁Am iens , ▁Re ims ▁and ▁Saint - G erm ain ). ▁ ▁The ▁c athedral ▁exterior ▁ ▁The ▁c athedral ▁fa ç ade ▁is ▁domin ated ▁by ▁two ▁pol yg onal ▁uns ym met rical ▁to wers ▁with ▁a ▁height ▁near ing ▁ 5 0 ▁metres . ▁A bove ▁the ▁central ▁door ▁is ▁a ▁terra ce ▁which ▁enabled ▁the ▁bishop ▁to ▁address ▁a ▁crowd ▁and ▁give ▁bless ings ▁and ▁under ▁the ▁right - hand ▁tower ▁is ▁a ▁small ▁door ▁used ▁in ▁the ▁Middle ▁A ges ▁as ▁an ▁entrance ▁for ▁le pers . ▁ ▁The ▁North ▁side ▁of ▁the ▁c athedral ▁ ▁The ▁East ▁end ▁ ▁The ▁south ▁portal ▁and ▁por ch ▁▁ ▁Not ▁as ▁deep ▁as ▁the ▁usual ▁por ch , ▁the ▁south ▁por ch ▁is ▁decor ated ▁with ▁stat ues ▁of ▁John ▁the ▁Evangel ist ▁and ▁saint ▁Simon ▁car ved ▁by ▁the ▁Y ves ▁Hern ot ▁work shop ▁in ▁the ▁ 1 9 th ▁century