Piazza Navona is one of the most famous and arguably the most beautiful of Rome's many squares. The large and lively square features no less than three magnificent fountains and is surrounded by restaurants and terraces, giving it a lively and delightful atmosphere throughout the year. Dominated by the Baroque church of Sant'Agnese in Agone, it also hosts the Palazzo Pamphili, the family palace of Pope Innocent X, who had much influence on the square's architecture and aesthetics. Piazza Navona follows the form of the open space of the stadium that Emperor Domitian built in the 1st century A.D. It was known as Circus Agonalis, where the ancient Romans came to watch games. Today, artists, street vendors, and performers populate the square, maintaining a vibrantly entertaining character. Historically, during the Christmas season, the piazza hosted a toy market, and it continues to be a central hub for festive activities in Rome.