The Trevi Fountain takes its name from being at the meeting point of three roads (tre vie). It was at the end point of an aqueduct and the Roman custom of building a fountain at the end of an aqueduct was revived. The fountain adjoins Palazzo Poli. A competition for design led to the appointment of Nicola Salvi and the fountain was built 1732-62. The theme is Taming of the waters, realised through a brilliant composition of architecture, rockwork, sculpture and waterworks.The fountain dominates the piazza which is treated by visitors as an outdoor theatre.