Piazza Venezia

Designed by Bramante to mark the spot of St. Peter's martyrdom, this delightful miniature building is considered a masterpiece of Renaissance architecture. Open to the public.

Contains the tomb of Pope Hadrian IV, the last non-Italian pope before Pope John Paul I.

A great little cathedral to visit, lovingly looked after by Irish Dominicans. There is an excavated older church below the medieval church you enter and a Mithraeum (temple to Mithras, whose cult was very popular with Roman soldiers from the 1st to 4th century AD) below that. The only place in Rome to hear the underground river that flows beneath the city.

A lovely, if somewhat run-down park (parts of it are blocked due to the poor state of the roads) with statues and a great view on the city.

This is a treasure-trove of art. There are a couple of paintings by Caravaggio: "The Crucifixion of Saint Peter" and "The Conversion of Saint Paul" (in a dim alcove to the left of the altar, both at right angles to the viewer, with a machine wanting €2 to switch on the lighting) together with a sculpture by Bernini, frescoes by Pinturicchio and mosaics by Raphael. Part of the Dan Brown tour, this church featured in Angels and Demons, although the Vatican did not allow filming inside.

The Piazza di Spagna (Spanish Square) is the most famous square in Rome. For a very long time it was the meeting point of all foreigners coming to Rome. In the 17th century it was the residence of the Spanish Ambassador to the Holy See. The area around the residence was Spanish territory and foreigners who stayed here without permission were forced to serve in the Spanish army. The Fontana della Barcaccia (Old Boat Fountain) on Piazza di Spagna was designed and built in 1627-29 by Pietro Bernini, father of the more famous Gian Lorenzo Bernini. The fountain celebrates the fact that before high walls were built along the banks of the Tiber Rome often used to flood. Once the waters were so high that a boat ended up in the square. The decorations on the fountain imitate the coat of arms of Pope Urban VII, Barberini'p, who ordered the fountain to be built. A less aesthetic occupant of the square is Italy's first McDonalds, dating back to 1986. Also in the piazza is a column erected in 1856 to commemorate the Immaculate Conception. The column is topped by a statue of the Virgin Mary, and rests on a base with statues of Moses, David, Isaiah and Ezekiel. The Pope visits the Piazza every year on December 8th to celebrate Immaculate Conception.

A truly monumental stairway of 135 steps (similar to climbing eight flights of stairs), built with French funds between 1721 and 1725 in order to link the Bourbon Spanish embassy to the Holy See (still located in the piazza below), with the Bourbon French church (its monastery founded in 1495) above. Don't sit on them though, or eat, or push a baby stroller on them, or do anything else that might obstruct pedestrians, make them dirty, or cause additional wear and tear, or else you will have to pay a fine that ranges from €250 to €400.

A tomb for the wealthy Gaius Cestius, who died in 12 BC. Admission to the monument only by guided tours on specific dates (2nd and 4th Saturday every month, and in combination with a ticket to the Museum of Via Ostiense also on the 1st and 3rd Saturday of every month).

Home of the Abbot Primate of the Benedictine Confederation and Benedictine monks studying in Rome. Visit the monastic produce shop and listen to the best Gregorian chant in Rome during Vespers (19:15 each evening).

A very ancient church named after a saint who was in 1969 removed from the Roman Catholic calendar of saints for the lack of details of her life. But the church retains the name and is well worth visiting for an excellent 4th-century mosaic and attractive decorations on the facade. Visiting hours are short, but if you arrive close to 11:30, try talking to the attendant if you see him, and he might let you visit for a few minutes. The church is small, so 15 minutes should be long enough to see and absorb everything.

Borghese Gallery and Museum is a lovely display in a beautiful villa setting, which concentrates on the quality rather than the size of its collection. There are some very notable works by Antonio Canova and Gian Lorenzo Bernini here, Bernini's Apollo and Daphneis quite amazing. It also houses some of Caravaggio paintings, well worth the admission charge. Originally, the gallery was one of the most magnificent private art collections in the world. It was founded by Cardinal Scipione Borghese. At the beginning of the 19th century, Prince Camillo Borghese sold great parts of the collections to Paris where today they belong to the most valuable exhibits of the Louvre. Since 1902 the villa and the gallery are owned by the Italian state. The number of people admitted is limited to 360 every 2 hours, so it is best to make a well in advance for the time slot you want. Cameras and photography are allowed. Plan to arrive at the museum at least 15 minutes prior to your entry time, to obtain your ticket from Will Call and to deposit purses, strollers, backpacks, bottles, and other bulky items in the cloak room. If you are late for your reservation the museum may not allow you to use your ticket.

Built after 1631, the crypt of the church contains a macabre display - a series of chapels decorated with the bones of 3700 dead friars. The bones are glued to the walls and ceilings in bizarre and striking decorations.

The 4th rebuilding of the meeting place for the Roman Senate, once converted into a church during the Middle Ages, but now restored since the 1930s.

Pope Nicholas III connected Castel Sant'Angelo to St. Peter's by a covered fortified corridor called the Passetto di Borgo. This proved useful for Pope Clement VII during the Sack of Rome (1527). You can still see much of the Passetto by walking along the Borgo Sant'Angelo, which runs parallel to, and north of, the Via della Conciliazione.

With its strange Liberty- style buildings with influence from the Art Nouveau of the 1920s this small bunch of blocks is one of the most interesting, and less known, landmarks of the city. A must see.