ACINCUM, AQUINCUM(Ἀκούιγκον, Ptol. 2.16.4; Tab. Peut.; Orelli, Inscript. 506, 959, 963, 3924; Ammian. 30.5; Itin. Anton.), a Roman colony and a strong fortress in Pannonia, where the legion Adjutrix Secuda was in garrison (Dio Cass.), and where also there was a large manufactory of bucklers. Acincum, being the centre of the operations on the Roman frontier against the neighbouring Iazyges ( Slovács), was occasionally the head-quarters of the emperors. It answers to the present Alt-Buda, where Roman basements and broken pillars of aqueducts are still visible. On the opposite bank of the Danube, and within the territory of the lazyges, stood a Roman fort or outpost called, from its relative position, Contra-Acincum (Not. Imp.), which was connected with Acincum by a bridge. Contra-Acincum is named Πέσσιονby Ptolemy (Ptol. 3.7.2).
[W.B.D]