The Lighthouse is located in Egypt on the island of Pharaos (which gave the french word «phare ») in front of the city of Alexandria. During the centuries, this island was connected with the continent by the alluviums of the Nile, on which we built a road and a bridge. The lighthouse, built on the island, was begun under Ptolemy II Philadelphus and ended around 280 BC by Sostratus of Cnidus. The lighthouse counted three floors: the first one was squared, the second was octagonal and the third cylindrical. The white marble whole measured approximately 135 m (440 feet) height from where we could see ships located 100 miles far away. Angles were decorated with bronze tritons which was used either to warn of the approach of the enemy by terrifying sounds, but also to carry mirrors which, durung the night, reflected the light of a fire. In the daytime, the smoke indicated to the boats the entrance of the port.