Trevi Fountain The 86ft high and 161ft wide Trevi Fountain is one of the most popular fountains in the world. It was designed by Italian architect, Nicola Salvi, in 1730 and construction began in 1732. The travertine stone fountain features two main stories with the god of all water, Oceanus, in the center niche. Coins are traditionally thrown into the fountain with the right hand over the left shoulder. The euros from the fountain go to subsidize a supermarket for Rome’s needy.