Because of its canals Bruges is often called 'The Venice of the North'. The water situation in both cities was, however, very different. Venice was founded on islands in a lagoon of the Adriatic sea.  Bruges lies deeper inland ; at least now, because in the five centuries B.C the Flemish coastline must have been flooded several times by the North Sea. When the waters retreated they left behind different sea-arms via which ships could reach the area where now Bruges is situated. Bruges was probably already visited by the Vikings. The Flemish name 'Brugge' is probably derived from the Latin word 'Rogia' (which was the Latin name of the 'Reie' the river which flowed through Bruges), and the Scandinavian word 'Bryggia', which meant 'mooring place'.