In 1929, the Lateran Treaty between Pope Pius XI and the Italian government created the Vatican, the world's second-smallest sovereign independent state. It has only a few hundred citizens and is protected (theoretically) by its own militia, the curiously uniformed (some say by Michelangelo) Swiss guards.

The only entrance to the Vatican for the casual visitor is through one of the glories of the Western world: Bernini's St. Peter's Square (Piazza San Pietro). As you stand in the huge piazza, you'll be in the arms of an ellipse partly enclosed by a majestic Doric-pillared colonnade. Atop it stands a gesticulating crowd of some 140 saints. Straight ahead is the facade of St. Peter's Basilica (Sts. Peter and Paul are represented by statues in front, with Peter carrying the keys to the kingdom), and, to the right, above the colonnade, are the dark brown buildings of the papal apartments and the Vatican Museums. In the center of the square is an Egyptian obelisk, brought from the ancient city of Heliopolis on the Nile delta. Flanking the obelisk are two 17th-century fountains. The one on the right (facing the basilica), by Carlo Maderno, who designed the facade of St. Peter's, was placed here by Bernini himself; the other is by Carlo Fontana.

On the left side of Piazza San Pietro is the Vatican Tourist Office (tel. 06-6988-4466 or 06-6988-4866), open Monday through Saturday from 8:30am to 7pm. It sells maps and guides that'll help you make more sense of the riches you'll be seeing in the museums. It also accepts reservations for tours of the Vatican Gardens and tries to answer questions.