The Colosseum, begun about AD 72, is the best known and best preserved structure remaining from ancient Rome. It was capable of holding 50,000 people to view the gladiatorial contests, the hunts, and the naval battles. Many of the materials of this magnificent edifice were later used in the construction of various churches and palaces.
The Trevi Fountain is one of the most impressive of Rome's many fountains. The waters play about a sculpture of Neptune, the sea god, riding in the winged chariot drawn by marble tritons. According to ancient tradition, by tossing a coin into the basin of the fountain, a tourist is assured a return to Rome.
St. Peter's Square was created by Bernini and is one of the loveliest squares in the world. Twin Doric colonnades topped with statues of various saints and martyrs flank either side of the square; a 26-meter-high obelisk rises from the center. At the head of the square is the magnificent Basilica of St. Peter.