Aquincum: important Roman military base on the Danube, a bit north of modern Budapest.
Originally a settlement of the tribe of the Aravisci, Aquincum became the residence of the governor (a proconsul) of the Roman province of Pannonia Inferior. The site consists of
- a military base (since the reign of the emperor Trajan occupied by II Adiutrix),
- a bridgehead across the Danube (Trans Aquincum),
- auxiliary forts like Buda and Pest (ancient Contra Aquincum),
- a civil settlement in the north,
- and the palace of the proconsul.
In Late Antiquity, the Avars settled in Aquincum.