2 1 st - century ▁American ▁conduct ors ▁( music ) ▁Category : 2 1 st - century ▁American ▁male ▁mus icians ▁Category : Class ical ▁music ▁produ cers ▁Category : American ▁record ▁produ cers <0x0A> </s> ▁__ NOT OC __ ▁AD ▁ 9 9 ▁( X C IX ) ▁was ▁a ▁common ▁year ▁starting ▁on ▁T ues day ▁( link ▁will ▁display ▁the ▁full ▁calendar ) ▁of ▁the ▁Julian ▁calendar . ▁At ▁the ▁time , ▁it ▁was ▁known ▁as ▁the ▁Year ▁of ▁the ▁Cons ul ship ▁of ▁Pal ma ▁and ▁S ene cio ▁( or , ▁less ▁frequently , ▁year ▁ 8 5 2 ▁Ab ▁ur be ▁cond ita ). ▁The ▁den om ination ▁AD ▁ 9 9 ▁for ▁this ▁year ▁has ▁been ▁used ▁since ▁the ▁early ▁medieval ▁period , ▁when ▁the ▁An no ▁Dom ini ▁calendar ▁era ▁became ▁the ▁pre val ent ▁method ▁in ▁Europe ▁for ▁naming ▁years . ▁ ▁Events ▁▁ ▁Emperor ▁Tra jan ▁returns ▁to ▁Rome ▁from ▁an ▁ins pection ▁of ▁the ▁Roman ▁leg ions ▁along ▁the ▁Rh ine ▁and ▁Dan ube ▁front iers . ▁ ▁Em iss aries ▁of ▁the ▁K ush an ▁Empire ▁reach ▁Emperor ▁Tra jan . ▁ ▁Rich imer us ▁I ▁f ights ▁a ▁battle ▁with ▁a ▁combined ▁army ▁of ▁Rom ans ▁and ▁Ga uls ▁at ▁Bas ana ▁near ▁A achen . ▁▁▁ 2 9 ▁August ▁- ▁Pap yrus ▁O xy rh yn chus ▁ 5 8 1 , ▁recording ▁the ▁sale ▁of ▁a ▁slave ▁girl , ▁is ▁written . ▁ ▁B irth s ▁▁