With a facade inspired by ancient Rome's triumphal arches and worthy of an important church, this 17th-century fountain was commissioned by Pope Paul V to celebrate his renovation of Trajan's 1st-century AD aqueduct. This fountain has a namesake in the large but less imposing fountain that is the centerpiece in Piazza Trilussa, which was moved across the river from Via Giulia in 1898 when the Tiber's embankments were constructed. It, too, was built by Paul V.