Constanța, historically known as Tomis is the oldest extant city in Romania. It was founded around 600 BC. The city is located in the Dobruja region of Romania, on the Black Sea coast. It is the capital of Constanța County and the largest city in the region.
The city is the fifth most populous in Romania. Its metropolitan area, includes 14 localities within 30 km of the city,and, with 425,916 inhabitants, it is the second largest metropolitan area in Romania.