Vindobona

Vindobona (from Gaulish windo- "white" and bona "base/bottom") was a Celtic settlement and later a Roman military camp on the site of the modern city of Vienna in Austria.

Around 15 BC, the kingdom of Noricum was included in the Roman Empire. Henceforth, the Danube marked the border of the empire, and the Romans built fortifications and settlements on the banks of the Danube, including Vindobona with an estimated population of 15,000-20,000.