▁the ▁An cient ▁of ▁Days , ▁but ▁this ▁icon ography ▁became ▁rare . ▁When ▁the ▁Father ▁is ▁dep icted ▁in ▁art , ▁he ▁is ▁sometimes ▁shown ▁with ▁a ▁h alo ▁sh aped ▁like ▁an ▁equ il ater al ▁triangle , ▁instead ▁of ▁a ▁circle . ▁The ▁Son ▁is ▁often ▁shown ▁at ▁the ▁Father ' s ▁right ▁hand . ▁He ▁may ▁be ▁represented ▁by ▁a ▁symbol — typ ically ▁the ▁Lamb ▁or ▁a ▁cross — or ▁on ▁a ▁cru c if ix , ▁so ▁that ▁the ▁Father ▁is ▁the ▁only ▁human ▁figure ▁shown ▁at ▁full ▁size . ▁In ▁early ▁medieval ▁art , ▁the ▁Father ▁may ▁be ▁represented ▁by ▁a ▁hand ▁appearing ▁from ▁a ▁cloud ▁in ▁a ▁bless ing ▁gesture , ▁for ▁example ▁in ▁scenes ▁of ▁the ▁Bapt ism ▁of ▁Christ . ▁Later , ▁in ▁the ▁West , ▁the ▁" T hr one ▁of ▁Mer cy " ▁( or ▁" T hr one ▁of ▁Grace ") ▁became ▁a ▁common ▁dep iction . ▁In ▁this ▁style , ▁the ▁Father ▁( s ometimes ▁se ated ▁on ▁a ▁throne ) ▁is ▁shown ▁supporting ▁either ▁a ▁cru c if ix ▁or , ▁later , ▁a ▁sl ump ed ▁cru c ified ▁Son , ▁similar ▁to ▁the ▁Piet à ▁( this ▁type ▁is ▁distinguished ▁in ▁German ▁as ▁the ▁Not ▁Gott es ) ▁in ▁his ▁out st retch ed ▁arms , ▁while ▁the ▁D ove ▁ho vers ▁above ▁or ▁in ▁between ▁them . ▁This ▁subject ▁continued ▁to ▁be ▁popular ▁until ▁the ▁ 1 8 th ▁century ▁at ▁least . ▁ ▁By