In the Neolithic Era, there was already human presence in the territory of Barcelona. At the end of the 1st century BC, it was founded as a Roman colony under the name of Barcino. It had about a thousand citizens and it was surrounded by a defensive wall which still remains remains in the old town. For more than 200 years, Barcelona was under the Muslim domain, and with the Christian reconquest became a county of the Carolingian Empire and the residence of the Reign of Aragon. The great Medieval Era turned Barcelona into the economic and political center of the West Mediterranean. The Gothic Quarter of the city is the precious testimony of the splendor that lived in Barcelona from the 13th to the 15th Centuries.