The Quattro Fontane (the Four Fountains) is an ensemble of four Late Renaissance fountains located at the intersection of Via delle Quattro Fontane and Via del Quirinale inRome. They were commissioned by Pope Sixtus V and built at the direction of Muzio Mattei, and were installed between 1588 and 1593. The figure of one fountain is said to represent the River Tiber, in front of an oak-tree; a she-wolf, the symbol of Rome, was a later addition. A second fountain represents the River Aniene, a tributary of the Tiber, called Anio in ancient Rome, which provided most Roman aqueducts with water. Pope Sixtus proposed to build a canal to bring the water of the Aniene to Rome.