This fountain is known as the Great Fountain and is one of the prominent landmarks in Rome. It is a very old fountain in the city dating back to 1614. It was built by the Flemish sculptor Jan Van Santen in cooperation with Giovanni Fontana. The fountain is distinguished by its construction method that made it a symbol of ancient engineering architecture. It is spread on its walls with inscriptions, decorations and beautiful geometric shapes, and this fountain is located in the famous Trilosa Square, and it gives the square a special aesthetic and attracts tourists to it greatly.