Fontana di Piazza Nicosia, Renaissance fountain in Piazza Nicosia, Rome, Italy.

The Fontana di Piazza Nicosia is a fountain in Rome made of an octagonal marble basin resting on three octagonal steps, with two upper basins of different diameters above it. The larger upper basin carries bas-reliefs of Pope Gregory XIII's winged dragon, alternating with the Borghese eagle. The upper basins are reconstructions from 1940 based on a 17th-century print; the octagonal basin is the original element.

Giacomo della Porta designed this fountain in 1572 under Pope Gregory XIII as part of Rome's major water infrastructure renewal. The project reflected papal efforts to restore ancient aqueducts and create new public water sources across the city.

The fountain displays dragon motifs from Pope Gregory XIII's coat of arms, linking papal power directly to this public space where Romans and visitors gather daily.

The fountain sits in a central location on Piazza Nicosia and is easily accessible on foot. It draws water from the ancient Aqua Virgo system that remains operational today, providing fresh water for residents and visitors.

The name Trullo recalls Piazza del Popolo's original name, Piazza del Trullo. The fountain reached Piazza Nicosia only in 1950, after a spell on the Gianicolo in front of San Pietro in Montorio and years dismantled in a municipal depot; its two upper basins were rebuilt from a 17th-century print.