- ha ired , ▁old ▁man ▁in ▁a ▁green ▁clo ak , ▁holding ▁a ▁le ather ▁bag . ▁He ▁is ▁the ▁person ification ▁of ▁the ▁river ▁Jordan . ▁A bove , ▁the ▁Holy ▁Spirit ▁in ▁the ▁form ▁of ▁a ▁dove ▁sp ray s ▁l ustral ▁water ▁from ▁its ▁be ak . ▁ ▁Below , ▁a ▁process ion ▁of ▁the ▁Apost les , ▁led ▁in ▁separate ▁directions ▁by ▁Saint ▁Peter ▁and ▁Saint ▁Paul ▁circle ▁the ▁d ome , ▁meeting ▁at ▁a ▁throne ▁with ▁a ▁jewe led ▁cru c if ix ▁rest ing ▁on ▁a ▁pur ple ▁c ush ion . ▁ ▁It ▁took ▁the ▁artists ▁several ▁years ▁to ▁complete ▁these ▁m osa ics , ▁as ▁can ▁be ▁clearly ▁seen ▁from ▁the ▁different ▁colors ▁of ▁the ▁stones ▁used ▁to ▁dep ict ▁the ▁grass ▁at ▁the ▁feet ▁of ▁the ▁apost les . ▁ ▁The ▁designs ▁are ▁quite ▁simple , ▁but ▁the ▁excess ive ▁use ▁of ▁a ▁gold ▁background ▁should ▁be ▁noted , ▁as ▁it ▁was ▁typically ▁used ▁in ▁this ▁era ▁to ▁inf use ▁these ▁simple ▁scenes ▁with ▁an ▁eth ere al ▁g low . ▁ ▁Similar ity ▁to ▁Eastern ▁Orth odox ▁architecture ▁▁ ▁The ▁entire ▁composition ▁is ▁remark ably ▁similar ▁to ▁that ▁of ▁the ▁Orth odox ▁Bapt istry ▁of ▁Ne on . ▁The ▁walls ▁are ▁bare , ▁but ▁were ▁not ▁always ▁so . ▁During ▁arch ae ological ▁investig ations , ▁some ▁ 1 7 0 ▁kil og rams ▁of ▁t ess era ▁were ▁found ▁on ▁the ▁floor . ▁ ▁Due ▁to ▁the ▁lack ▁of ▁A rian