San Sebastiano fuori le mura

One of the oldest churches in the city. The nave is lined with a mismatched collection of columns taken from ancient Roman buildings. The apse is covered in gold mosaics from the 13th century, arguably the finest mosaics in the city. Impressive mosaics also on the front. According to legend the church was founded in 222, so it would be one of the most ancient churches in the city. Written records mention a church on this place in 337. What is visible today was built in the 12th century, by order of Pope Innocent III. The facade is decorated with mosaics representing the Virgin Mary and ten unidentified figures. Most probably these mosaics are the work of Petro Cavallini who created the mosaics of the lower apse dated 1290 representing scenes from the life of Mary. The mosaics of the upper apse in byzantine style are even older and date from 1140. The columns of the nave originate from the ancient Baths of Caracalla. The facade of Santa Maria in Trastevere is even more impressive at night when it is illuminated.

This church was built by the Emperor Constantine (272-337) as a mausoleum for his daughters Constantina and Helena. It was part of a much larger cemetery complex, parts of which can still be seen. The mausoleum was consecrated as a church and dedicated to Constantina when she became a saint in 1254. The building is circular with an inner arcade resting on pairs of granite columns. It retains some marvellous mosaics from the 4th Century.

Wandering around the shopping and residential district of Prati, close to the Vatican, you may notice rather a lot of lawyers' nameplates outside buildings. This is also Rome's legal district because of the proximity of the Palazzo di Giustizia or Palace of Justice. This massive monstrosity on the banks of the Tiber was built on alluvial soil, which necessitated a concrete platform to support the foundations. Despite this, later settlement of the building led to the need for restoration work in 1970 and it is said to be still sinking. There were many allegations of corruption during its construction, something not unknown in the Rome of today, and this, combined with its appearance, gave rise to its nickname of the Palazzaccio or Ugly Palace.

Between the Pantheon and Via del Corso. A stunning example of Baroque art. The ceiling frescoes are especially fine, including a trompe l'oeil dome by the master Andrea Pozzo.

This is not, contrary to popular belief, one of the original seven hills that Rome was founded on. It is the second highest after Monte Mario, though, and offers incredible panoramic views of the city as long as the authorities remember to prune the trees on the hillside (if they are too tall you can walk a few meters down the hill for views that are just as good). On the other side of the piazza there is also a nice view of the dome of St. Peter's. The Piazza and the street leading up the hill are dedicated to Giuseppe Garibaldi who led Italian troops against the French here in 1849. There are also several commemorative statues.

A small piazza just behind the Pantheon. The centerpiece is a statue of an elephant by Bernini with an ancient obelisk on its back.

This is one of the two main Jesuit churches in Rome, the other being the nearby Sant'Ignazio. The interior is Baroque art on steroids. Simply astounding.

With Bernini's famous Triton Fountain. Via Veneto starts here too.

This garden was established in 1883. It has over 3,500 species of plants and includes a "Scent-and-Touch" garden for those who are visually impaired.

The museum is dedicated to Napoleon Bonaparte and his family. After Napoleon's death in 1821 the Pope gave permission to his family to settle down in Rome. His sister married Prince Camillo Borghese.

The most extensive collection of Etruscan art and artifacts anywhere. Fantastic collection and well worth the admission charge. A difficult museum to find, but a lovely display in a beautiful villa setting.

This remarkable building, designed partly by Bernini, houses the National Gallery of Ancient Art, and includes some famous paintings by Filippo Lippi and Caravaggio, as well as Raphael's "La Fornarina".

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.

Behind the pyramid, entered by the Via Caio Cestio, is the Protestant Cemetery where the poet John Keats was buried in 1821 and Percy Bysshe Shelley's ashes were also buried after his drowning in 1822. Richard Dana, author of Two Years before the Mast was buried there in 1882, and the Beat Generation poet Gregory Corso was buried there in 2001.

Porta San Sebastiano is a gate in the amazingly well-preserved Aurelian Walls. Inside and upstairs is a museum dedicated to the construction of the walls and their recent restoration. You can take a walk along the top of the walls. At the museum you can also arrange to visit the Tomb of the Scipios (Sepolcro degli Scipiani) and a nearby Roman Columbarium (tomb for cremated remains), the entrance for which is 200 m back towards Rome along the Via Di Porta San Sebastiano. No wheelchair access.

The Servian Wall was the first wall around Rome, built around the 3rd century BC. This well-preserved section provides a good opportunity to observe the construction methods of that time, particularly the use of tufa rock blocks

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.

This church was built next to the mausoleum of Santa Costanza in the 7th Century and is on top of catacombs. It is very unusual in that the floor level is at the level of the catacomb floor, and the street entrance is at the level of the second floor gallery. The body of St. Agnes lies in a silver sarcophagus. There are several stories about her death at the age of 13 in 304 AD. One is that the prefect Sempronius wanted her to marry his son, and condemned her to death when she refused. Roman law did not permit the execution of virgins, so he ordered her to be raped but her virginity was miraculously preserved. She was then condemned to be burnt at the stake but the wood would not burn. Another is that she was stripped naked by the Emperor Diocletian because of her refusal to marry but that her hair then grew rapidly to preserve her modesty.

A 1st-century tomb surrounded by two farmhouses from the Middle Ages, one of which used to be a cheese store. Rather hidden behind a high wall, the tomb is rarely open to the public. You might be lucky on a Sunday: on the third Sunday of every month there is a guided tour at 11:00.

Built in honour of Victor Emmanuel, the first king of a unified Italy, this vast structure may appear to be solid white marble but actually contains many rooms inside. There are two permanent museums, one on Italian Reunification and one on emigration from Italy, as well as other spaces that host rotating exhibitions. A walk through the Flag Room leads to the tomb of the unknown soldier. Good views from half-way up but you can also pay €10 (€2 concessions) and take a lift all the way to the top.