Historic district of Rome

The Colosseum ( KOL-ə-SEE-əm; Italian: Colosseo [kolosˈsɛːo]) is an oval amphitheatre in the centre of the city of Rome, Italy, just east of the Roman Forum. It is the largest ancient amphitheatre ever built, and is still the largest standing amphitheatre in the world today, despite its age. Construction began under the emperor Vespasian (r. 69–79 AD) in 72 and was completed in 80 AD under his successor and heir, Titus (r. 79–81). Further modifications were made during the reign of Domitian (r. 81–96). The three emperors that were patrons of the work are known as the Flavian dynasty, and the amphitheatre was named the Flavian Amphitheatre (Latin: Amphitheatrum Flavium; Italian: Anfiteatro Flavio [aɱfiteˈaːtro ˈflaːvjo]) by later classicists and archaeologists for its association with their family name (Flavius). The Colosseum is built of travertine limestone, tuff (volcanic rock), and brick-faced concrete. It could hold an estimated 50,000 to 80,000 spectators at various points in its history, having an average audience of some 65,000; it was used for gladiatorial contests and public spectacles including animal hunts, executions, re-enactments of famous battles, and dramas based on Roman mythology, and briefly mock sea battles. The building ceased to be used for entertainment in the early medieval era. It was later reused for such purposes as housing, workshops, quarters for a religious order, a fortress, a quarry, and a Christian shrine. Although substantially ruined because of earthquakes and stone-robbers (for spolia), the Colosseum is still an iconic symbol of Imperial Rome and was listed as one of the New7Wonders of the World. It is one of Rome's most popular tourist attractions and also has links to the Roman Catholic Church, as each Good Friday the Pope leads a torchlit "Way of the Cross" procession that starts in the area around the Colosseum. The Colosseum is depicted on the Italian version of the five-cent euro coin.

The Colossus of Nero (Colossus Neronis) was a 30-metre (98 ft) bronze statue that the Emperor Nero (37–68 AD) created in the vestibule of his Domus Aurea, the imperial villa complex which spanned a large area from the north side of the Palatine Hill, across the Velian ridge to the Esquiline Hill. It was modified by Nero's successors into a statue of the sun god Sol. The statue was eventually moved to a spot outside the Flavian Amphitheatre, which (according to one of the more popular theories) became known, by its proximity to the Colossus, as the Colosseum. The last mention of the Colossus is in an illuminated manuscript from the late 4th century AD. The statue disappeared sometime afterwards, likely toppled by an earthquake or destroyed during the Sack of Rome, although some sources indicate the statue may have remained standing as late as the 7th century AD. Today, the only remnants of the statue are some concrete blocks that once made up the foundation of its marble pedestal.

Colosseo is a station on Line B of the Rome Metro. It was opened on 10 February 1955 and is located, as its name suggests, in the Monti rione on via del Colosseo near the Colosseum. The station is currently being expanded to be the new northern terminus of Metro's Line C. Its atrium houses mosaics from the Artemetro Roma Prize. They are by Pietro Dorazio (Italy), Kenneth Noland (United States) and Emil Schumacher (Germany). The main exit is on the lower level, in front of the Colosseum on the Piazza Del Colosseo and to the right of the Arch of Constantine, whilst the other exit is a second story one, located in the middle of the Largo Gaetana Agnesi park above the Piazza.

The Arch of Constantine (Italian: Arco di Costantino) is a triumphal arch in Rome dedicated to the emperor Constantine the Great. The arch was commissioned by the Roman Senate to commemorate Constantine's victory over Maxentius at the Battle of Milvian Bridge in AD 312. Situated between the Colosseum and the Palatine Hill, the arch spans the Via Triumphalis, the route taken by victorious military leaders when they entered the city in a triumphal procession. Dedicated in 315, it is the largest Roman triumphal arch, with overall dimensions of 21 m (69 ft) high, 25.9 m (85 ft) wide and 7.4 m (24 ft) deep. It has three bays, the central one being 11.5 m (38 ft) high and 6.5 m (21 ft) wide and the laterals 7.4 m (24 ft) by 3.4 m (11 ft) each. The arch is constructed of brick-faced concrete covered in marble. The three bay design with detached columns was first used for the Arch of Septimius Severus in the Roman Forum (which stands at the end of the triumph route) and repeated in several other arches now lost. Though dedicated to Constantine, much of the sculptural decoration consists of reliefs and statues removed from earlier triumphal monuments dedicated to Trajan (98–117), Hadrian (117–138) and Marcus Aurelius (161–180).

The Meta Sudans (Latin: "sweating turning post") was a large monumental conical fountain in ancient Rome.The Meta Sudans was built some time between 89 and 96 under the Flavian emperors, a few years after the completion of the nearby Colosseum. It was built between the Colosseum and the Temple of Venus and Roma, close to the later Arch of Constantine, at the juncture of four regions of ancient Rome: regions I, III, IV, X (and perhaps II).A meta was a tall conical object in a Roman circus that stood at either end of the central spina, around which racing chariots would turn. The Meta Sudans had the same shape, and also functioned as a similar kind of turning point, in that it marked the spot where a Roman triumphal procession would turn left from the via Triumphalis along the east side of the Palatine onto the via Sacra and into the Forum Romanum itself. The Meta Sudans was built of a brick and concrete core, faced with marble. It seems to have "sweated" the water (sudans means "sweating"), rather than jetting it out the top. This may mean that it oozed out the top, or perhaps that water came from holes in its side. The monument is estimated to have stood up to 17m high; until the 20th century, its concrete core was still over 9m high. It had a base pool 16m wide and 1.4m deep. The fountain was obviously damaged in the Middle Ages because it already appears as a ruin in early views of the Colosseum. Photos from the end of the 19th century show a conical structure of solid bricks next to the Arch of Constantine, surrounded by its own original, reflecting stone pool. The ruins of Meta Sudans survived until the 20th century. In 1936 Benito Mussolini had its remains wantonly demolished and paved over to make room for the new traffic circle around the Colosseum. A commemorative plaque was set in the road. Although the above-ground structure is gone, its foundations were later re-excavated, revealing the extensive substructure. After another excavation in 1997-98 the traffic circle was closed and the area became a pedestrian district.Extensive excavations directed by Clementina Panella of the University of Rome "La Sapienza" have revealed extensive archaeological information about the Meta Sudans and the northeast slope of the Palatine Hill.

The Via Sacra (Latin: Sacra Via, "Sacred Street") was the main street of ancient Rome, leading from the top of the Capitoline Hill, through some of the most important religious sites of the Forum (where it is the widest street), to the Colosseum. The road was part of the traditional route of the Roman Triumph that began on the outskirts of the city and proceeded through the Roman Forum. Later it was paved and during the reign of Nero it was lined with colonnades. The road provided the setting for many deeds and misdeeds of Rome's history, the solemn religious festivals, the magnificent triumphs of victorious generals, and the daily throng assembling in the Basilicas to chat, throw dice, engage in business, or secure justice. Many prostitutes lined the street as well, looking for potential customers. From the reign of Augustus, the Via Sacra played a role in the Apotheosis ceremony by which deceased Roman Emperors were formally deified. The body of the Emperor, concealed under a wax death mask, was carried on a pall from the Palatine hill down the Via Sacra into the Forum, where funeral orations were held before the procession of Knights and Senators resumed its course to the Campus Martius.

The Temple of Venus and Roma (Latin: Templum Veneris et Romae) is thought to have been the largest temple in Ancient Rome. Located on the Velian Hill, between the eastern edge of the Forum Romanum and the Colosseum, in Rome, it was dedicated to the goddesses Venus Felix ("Venus the Bringer of Good Fortune") and Roma Aeterna ("Eternal Rome"). The building was the creation of the emperor Hadrian and construction began in 121. It was officially inaugurated by Hadrian in 135, and finished in 141 under Antoninus Pius. Damaged by fire in 307, it was restored with alterations by the emperor Maxentius.

The Ludus Magnus (also known as the Great Gladiatorial Training School) was the largest of the gladiatorial schools in Rome. It was built by the emperor Domitian (r. 81–96 C.E.) in the late first century C.E., alongside other building projects undertaken by him such as three other gladiatorial schools across the Roman Empire. The training school is situated directly east of the Colosseum in the valley between the Esquiline and the Caelian hills, an area already occupied by Republican and Augustan structures. While there are remains that are visible today, they belong to a reconstruction that took place under the emperor Trajan (r. 98–117) where the Ludus plane was raised by about 1.5 metres (4 ft 11 in). The Ludus Magnus was essentially a gladiatorial arena where gladiators from across the Roman Empire would live, eat, and practice while undergoing gladiatorial training in preparation for fighting at the gladiatorial games held at the Colosseum.

The Temple of Claudius (Latin: Templum Divi Claudii), also variously known as the Temple of the Divus Claudius, the Temple of the Divine Claudius, the Temple of the Deified Claudius, or in an abbreviated form as the Claudium, was an ancient structure that covered a large area of the Caelian Hill in Rome, Italy. It housed the Imperial cult of the Emperor Claudius, who was deified after his death in 54 AD.

The Baths of Titus or Thermae Titi were public baths (Thermae) built in 81 AD at Rome, by Roman emperor Titus. The baths sat at the base of the Esquiline Hill, an area of parkland and luxury estates which had been taken over by Nero (AD 54–68) for his Golden House or Domus Aurea. Titus' baths were built in haste, possibly by converting an existing or partly built bathing complex belonging to the reviled Domus Aurea. They were not particularly extensive, and the much larger Baths of Trajan were built immediately adjacent to them at the start of the next century.

The Domus Aurea (Latin, "Golden House") was a vast landscaped complex built by the Emperor Nero largely on the Oppian Hill in the heart of ancient Rome after the great fire in 64 AD had destroyed a large part of the city.It replaced and extended his Domus Transitoria that he had built as his first palace complex on the site.

The Velia — or Velian Hill or Velian Ridge — is a saddle or spur stretching out from the middle of the north side of the Palatine Hill towards the Oppian Hill (itself a spur of the Esquiline Hill) in Rome. In later times, the Velia was called Summa Sacra Via ("Summit of the Sacra Via") — since that road began there at its highest point — and was marked by the Arch of Titus and Temple of Venus and Roma. (An alternate theory is that the Velia was actually the eastern half of the Palatine).