▁coat ▁of ▁arms ▁of ▁La ▁Bou ë x ière . ▁ ▁The ▁alt ar ▁known ▁as ▁the ▁" aut el ▁commun al " ▁ ▁This ▁gran ite ▁alt ar ▁and ▁alt arp ie ce ▁dates ▁to ▁ 1 6 6 2 . ▁ ▁The ▁Saint - S acre ment ▁alt arp ie ce ▁ ▁This ▁is ▁the ▁work ▁of ▁François ▁Le ▁Pen ▁and ▁dates ▁to ▁ 1 6 3 3 . ▁ ▁Mis cell aneous ▁ ▁B ells ▁ ▁The ▁oldest ▁of ▁the ▁c athedral ' s ▁six ▁b ells ▁is ▁that ▁known ▁as ▁" J a ques ". ▁It ▁dates ▁to ▁ 1 5 6 8 ▁and ▁came ▁from ▁the ▁found ry ▁of ▁Art us ▁Gu im arch ▁in ▁Mor la ix . ▁ ▁It ▁has ▁a ▁diameter ▁of ▁ 1 . 5 6 ▁metres ▁and ▁we igh s ▁ 2 , 0 6 7 ▁kil os . ▁ ▁Conf essional ▁boxes ▁ ▁There ▁are ▁nine ▁conf essional ▁boxes ▁in ▁the ▁c athedral . ▁Five ▁of ▁these ▁date ▁to ▁the ▁ 1 7 th / 1 8 th ▁century . ▁ ▁The ▁Great ▁Organ ▁ ▁The ▁great ▁organ ▁in ▁the ▁c athedral ▁was ▁built ▁between ▁ 1 6 5 7 ▁and ▁ 1 6 6 0 ▁by ▁the ▁English ▁refuge e ▁Robert ▁D all am . ▁It ▁is ▁composed ▁of ▁ 2 1 1 8 ▁pip es ▁and ▁is ▁listed . ▁It ▁is ▁said ▁that ▁in ▁the ▁design ▁of ▁the ▁organ , ▁Robert ▁was ▁influenced ▁by ▁the ▁organ ▁his ▁father ▁Thomas ▁had