The Roman Aqueduct (fig. 7) at Patras is situated in the NE of the Castle. This construction along with the wells (fig. 8) and natural springs was to provide the city with water. It is not known yet when exactly was constructed but it is probable that Hadrian in the early 2nd c. A.D. presented some major public work to the city as it is shown by an honorific inscription. Its beginning was at the Neromana, where the sources of the river Diakoniaris, at Romanos area, in the foothills of the mountain Panachaikos is and following the hills through subterranean pipes and carrying across ravines on high built arches arrives to Patras through Pyrgo Roufou, Kamares, Gravia, Samakia and Aroe. In Kamares (in two points), Gravia and Aroe there are two-arched built bridges for the bridging of the dales among the hills. Its length was 7,5 km. The water was conveyed to the city through underground pipes.