ius ▁II . ▁He ▁later ▁wrote ▁the ▁treat ise ▁De ▁cult u ▁imag in um ▁on ▁the ▁question . ▁At ▁a ▁council ▁in ▁ 8 2 9 , ▁again ▁at ▁Paris , ▁he ▁was ▁a ▁supp orter ▁of ▁the ▁rights ▁of ▁the ▁Emperor ▁over ▁the ▁cler gy . ▁He ▁participated ▁in ▁coun c ils ▁at ▁W orm s ▁in ▁ 8 3 3 , ▁Th ion ville ▁in ▁ 8 3 5 , ▁and ▁A achen ▁in ▁ 8 3 6 . ▁ ▁Jon as ' s ▁writ ings ▁included ▁De ▁Institution e ▁la ical i , ▁an ▁early ▁example ▁of ▁mirror - of - pr in ces ▁writing , ▁written ▁for ▁Mat fr id , ▁Count ▁of ▁Or lé ans . ▁De ▁Institution e ▁regia , ▁another ▁mirror ▁work , ▁was ▁written ▁for ▁Pi pp in ▁of ▁Aqu itaine . ▁ ▁References ▁▁ ▁Rich é , ▁Pierre , ▁D iction naire ▁des ▁Fran cs : ▁Les ▁Carol ing iens . ▁Bart ill at , ▁ 1 9 9 7 . ▁ ▁Further ▁reading ▁▁ ▁Jon as ▁d ' O rl é ans , ▁Le ▁met ier ▁du ▁roi : ▁De ▁institution e ▁regia , ▁ed . ▁& ▁trans . ▁A . ▁D ubre uc q . ▁Cer f , ▁ 1 9 9 5 ▁ ▁( S ources ▁Chr ét iennes ▁no . 4 0 7 ). ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁Jon as ▁d ' ▁Or lé ans ▁'' Inst ruction ▁des ▁La ï cs " ▁ed . ▁& ▁trans . ▁A . ▁D ubre