0 ) ▁in ▁the ▁form ▁Z ir id au a ▁() ▁as ▁an ▁important ▁town ▁in ▁western ▁D acia , ▁at ▁latitude ▁ 4 8 ° ▁N ▁and ▁longitude ▁ 4 6 ° ▁ 3 0 ' ▁E ▁( note ▁that ▁he ▁used ▁a ▁different ▁mer id ian ▁and ▁some ▁of ▁his ▁calculations ▁were ▁off ). ▁P to le my ▁completed ▁his ▁work ▁soon ▁after ▁Tra jan ' s ▁Da cian ▁Wars , ▁as ▁a ▁result ▁of ▁which ▁parts ▁of ▁D acia ▁were ▁incorpor ated ▁into ▁the ▁Roman ▁Empire ▁as ▁the ▁new ▁D acia ▁province . ▁However , ▁he ▁based ▁his ▁work ▁on ▁older ▁sources ▁like ▁Mar inus ▁of ▁Ty re , ▁as ▁Z ir id ava ▁is ▁believed ▁to ▁have ▁been ▁destroyed ▁during ▁the ▁war . ▁ ▁Tab ula ▁Pe ut inger iana ▁▁ ▁Un like ▁many ▁other ▁Da cian ▁towns ▁mentioned ▁by ▁P to le my , ▁Z ir id ava ▁is ▁missing ▁from ▁Tab ula ▁Pe ut inger iana ▁( 1 st – 4 th ▁centuries ), ▁an ▁it iner arium ▁showing ▁the ▁curs us ▁public us , ▁the ▁road ▁network ▁in ▁the ▁Roman ▁Empire . ▁ ▁This ▁prompt ed ▁the ▁Dan ish ▁phil ologist ▁and ▁historian ▁G ud mund ▁Sch üt te ▁to ▁assume ▁that ▁Z ir id ava ▁and ▁Z uro bara ▁are ▁one ▁and ▁the ▁same . ▁This ▁idea ▁is ▁de emed ▁err one ous ▁alongside ▁many ▁other ▁assumed ▁dup lications ▁of ▁names , ▁by ▁the ▁Roman ian ▁historian ▁and ▁arch ae ologist ▁Vas ile ▁P âr