Trevi Fountain is by far the most famous Baroque fountain in Rome and one of the most famous in the world. An unusual building occupies the entire wall of the Poli Palace and is about 26 meters high and 20 meters long. The central group of sculptures is Neptune surrounded by marine deities. The fountain supplies water brought to the city by the aqueduct built in 19 bc by Agrippa.
It owes its name to the legendary virgin Trevia, who reportedly discovered water at the source of the aqueduct. From here the fountain is called Trevi di Trevi, and the water flows to it - Acqua Virgo. According to the custom, to return to Rome, the tourist must throw a coin into the fountain, necessarily behind himself and over his shoulder. If you throw two will provide love, while three will guarantee the wedding. Nearly every day the money is collected by the municipal services. They are used for preservation of monuments and maintenance of the poorest Romans.