1 7 6 9 - 1 7 7 1 ). ▁ ▁His ▁earliest ▁work ▁dates ▁from ▁the ▁mid - 1 7 6 0 s . ▁It ▁is ▁a ▁temper a ▁fr ie ze ▁in ▁the ▁Casa ▁Cav all ucci ▁in ▁S erm on eta . ▁His ▁first ▁portrait ▁was ▁of ▁his ▁benef actor ▁Duke ▁Francesco ▁Ca et ani . ▁This ▁portrait ▁is ▁only ▁preserved ▁as ▁an ▁eng ra ving ▁in ▁ 1 7 7 2 ▁by ▁Pietro ▁Le one ▁Bomb elli ▁( 1 7 3 7 – 1 8 0 9 ). ▁ ▁His ▁first ▁major ▁commission ▁was ▁the ▁decor ation ▁of ▁five ▁audience ▁ch amb ers ▁in ▁the ▁Ca et ani ▁Palace ▁in ▁Rome ▁in ▁ 1 7 7 6 . ▁He ▁painted ▁myth ological ▁scenes ▁and ▁alleg ories ▁appropriate ▁for ▁each ▁room . ▁ ▁In ▁the ▁early ▁ 1 7 8 0 s ▁he ▁painted ▁mostly ▁port ra its , ▁such ▁as ▁those ▁of ▁Francesco ▁Ca et ani ▁and ▁Ter esa ▁C ors ini , ▁Duch ess ▁of ▁S erm on eta . ▁ ▁The ▁Origin ▁of ▁Music ▁( 1 7 8 6 ) ▁is ▁probably ▁the ▁most ▁important ▁painting ▁ ▁of ▁his ▁mid - care er . ▁It ▁was ▁based ▁on ▁the ▁illustr ations ▁in ▁the ▁book ▁Icon ologia ▁( 1 5 9 3 ) ▁from ▁Ces are ▁R ip a . ▁ ▁The ▁comm issions ▁kept ▁coming ▁under ▁his ▁new ▁patron , ▁Card inal ▁Rom ual do ▁Bras chi - On esti ▁( 1 7 5 3 – 1