Fran çois ▁de ▁la ▁Mar che ▁this ▁by ▁L . ▁C ug not , ▁and ▁on ▁the ▁south ▁side ▁Mon se igneur ▁de ▁Vis del ou , ▁Mon se igneur ▁Roland ▁de ▁Ne uf ville ▁and ▁Mon se igneur ▁Guillaume ▁de ▁K ers au zon ▁ ▁The ▁main ▁alt ar ▁and ▁the ▁c ib or ium ▁ ▁Car ved ▁from ▁black ▁M our oux ▁mar ble , ▁the ▁alt ar ▁was ▁commission ed ▁in ▁ 1 7 4 6 ▁from ▁the ▁Mans ▁architect ▁Henry ▁Vill ars . ▁S urr ounded ▁by ▁two ▁ang els ▁the ▁alt ar ▁has ▁a ▁c ib or ium ▁which ▁hang s ▁from ▁a ▁car ved ▁wooden ▁rep lica ▁of ▁a ▁pal m ▁tree ▁symbol ising ▁" V ict ory " ▁and ▁the ▁" Res urre ction ". ▁This ▁pal m ▁tree ▁is ▁between ▁ 5 ▁and ▁ 6 ▁metres ▁high ▁and ▁is ▁rich ly ▁decor ated ▁with ▁whe at ▁ears , ▁v ine ▁leaves ▁and ▁g rap es . ▁The ▁pal m ▁tree ▁dates ▁to ▁around ▁ 1 8 2 0 ▁to ▁ 1 8 2 3 . ▁There ▁are ▁three ▁similar ▁c ib or iums ▁in ▁France , ▁at ▁Am iens , ▁Re ims ▁and ▁Saint - G erm ain . ▁ ▁Be hind ▁the ▁alt ar ▁is ▁an ▁elaborate ▁tab ern acle . ▁Be hind ▁the ▁main ▁alt ar ▁is ▁a ▁car ved ▁ 1 6 th - century ▁gran ite ▁alt ar ▁decor ated ▁with ▁t ref o il ▁arch es ▁and ▁the ▁arms ▁of