Conimbriga is an ancient settlement dating from the Copper Age (3300 to 1200 BC), which was an important center during the Roman Empire (10,000 and 15,000 inhabitants) and which after the Barbarian invasions continued to be inhabited until the 6th century, when the Episcopal bishop passed from Conimbriga to Coimbra. Conimbriga is seventeen kilometers south of Coimbra, and it was by the road that came from Sellium (Tomar) to Aeminum (Coimbra). Despite its natural defense status, this city has a point of vuneravel that is to depend its water supply of an aqueduct with 3km. This may be the main reason for their abandonment, since their survival would be jeopardized in case of siege in the middle ages. Part of Conimbriga (part of CondeixaaVelha) survived thanks to the existence of a small fountain located there.