▁Pal ais , ▁leading ▁to ▁the ▁elections ▁of ▁Bened ict ▁XII ▁in ▁ 1 3 3 4 , ▁Clement ▁VI ▁in ▁ 1 3 4 2 , ▁In noc ent ▁VI ▁in ▁ 1 3 5 2 , ▁Urban ▁V ▁in ▁ 1 3 6 2 , ▁Gregory ▁XI ▁in ▁ 1 3 7 0 ▁and ▁Bened ict ▁XIII ▁in ▁ 1 3 9 4 . ▁ ▁Description ▁The ▁Pal ais ▁is ▁actually ▁two ▁joined ▁buildings : ▁the ▁old ▁pal ais ▁of ▁Bened ict ▁XII , ▁which ▁s its ▁on ▁the ▁im pre gn able ▁rock ▁of ▁D oms , ▁and ▁the ▁new ▁pal ais ▁of ▁Clement ▁VI , ▁the ▁most ▁extra v ag ant ▁of ▁the ▁Av ignon ▁pop es . ▁T ogether ▁they ▁form ▁the ▁largest ▁Goth ic ▁building ▁of ▁the ▁Middle ▁A ges , ▁it ▁is ▁also ▁one ▁of ▁the ▁best ▁examples ▁of ▁the ▁International ▁Goth ic ▁architect ural ▁style . ▁The ▁construction ▁design ▁was ▁the ▁work ▁of ▁two ▁of ▁France ’ s ▁best ▁architect s , ▁Pierre ▁P ey sson ▁and ▁Jean ▁de ▁Lou v res , ▁and ▁the ▁lav ish ▁orn ament ation ▁was ▁the ▁work ▁of ▁two ▁of ▁the ▁best ▁students ▁of ▁the ▁School ▁of ▁S ien a ▁( Ital y ), ▁Sim one ▁Mart ini ▁and ▁Mat te o ▁Gi ovan etti . ▁ ▁In ▁addition , ▁the ▁pap al ▁library ▁hous ed ▁in ▁the ▁Pal ais ▁( the ▁largest ▁in ▁Europe ▁at ▁the ▁time ▁with ▁over ▁ 2 , 0 0 0 ▁volumes ), ▁attract