Located at Tagus river enormous tidal-estuary, navigable far up, Lisbon is visited by the East Mediterranean merchants searching precious metals and other raw materials since the 7th century B.C.

Over time these visits became more frequent and the stays became longer. As a result, between the 7th and the 5th centuries B.C., the first dwelling appeared, located between the hill where Castel of St. George would be built and the Tagus affluent.