San Gregorio Magno al Celio

Porta Capena was a gate in the Servian Wall in Rome, Italy. The gate was located in the area of Piazza di Porta Capena, where the Caelian, Palatine and Aventine hills meet. Probably its exact position was between the entrance of Via di Valle delle Camene and the beginning of Via delle Terme di Caracalla (known as the "Archaeological Walk"), facing the curved side of the Circus Maximus. Nowadays Piazza di Porta Capena hosts the FAO Headquarters. Between 1937 and 2004, it was home to the obelisk of Axum.

The Septizodium (also called Septizonium or Septicodium) was a building in ancient Rome. It was built in 203 AD by Emperor Septimius Severus. The origin of the name "Septizodium" is from Septisolium, from the Latin for temple of seven suns, and was probably named for the seven planetary deities (Saturn, Sun, Moon, Mars, Mercury, Jupiter, Venus) or for the fact that it was originally divided into seven parts. The building had no known practical purpose and was probably meant to be a decorative façade, known as a Nymphaeum. Ancient and medieval sources describe its purpose as being intended to impress Severus' fellow north Africans as they entered the city, as it was located at the place where the Via Appia passes the Palatine and leads east towards the Forum Romanum. Other examples of septizodia are known, all from Africa.Ammianus Marcellinus refers to the building in an ambiguous passage: "The plebs...had come together at the Septemzodium, a popular place, where Marcus Aurelius built a Nymphaeum in a rather ostentatious style."By the 8th century, the edifice was already ruined and had been incorporated in one of the numerous baronial fortresses of the medieval city, held in the 12th-13th century by the Frangipani family. In August 1241, after the death of Pope Gregory IX, the 11 cardinals who were able to get into Rome through the lines of Emperor Frederick II's army came together in the ramshackle palace of the Septizodium. The two-month-long election was arduous, not only because of the deep political crisis but the physical hardships. There was a frightful heat and the rain leaked through the roof of the chamber of the cardinals, mingled with the urine of Matteo Rosso Orsini's guards on the rooftiles. One of the cardinals fell ill and died. The new pope, Celestine IV, was also very worn out, and died 16 days after his election. In 1588, during the reign of Pope Sixtus V, the eastern facade of the building was demolished under the direction of Domenico Fontana. The stones obtained were used for the basement of the Flaminio Obelisk of Piazza del Popolo, the restoration of the Column of Marcus Aurelius, the pope's tomb in St. Mary Major and other structures.

The lesser-known Arch of Titus was a triple bay arch erected at the eastern end of the Circus Maximus by the Senate in A.D. 81, in honour of Titus and his capture of Jerusalem in the First Jewish–Roman War. Few traces remain. The inscription (CIL 19151=ILS 264), quoted by an 8th-century Swiss monk known only as the "Einsiedeln Anonymous", makes it clear that this was Titus' triumphal arch. Sculptural fragments of a military frieze have been attributed to the arch.Architectural and epigraphic fragments of the now lost arch were rediscovered during excavations in 2015.

The Domus Severiana is the modern name given to the final extension to the imperial palaces on the Palatine Hill in Rome, built to the south-east of the Stadium Palatinum in the Domus Augustana of Septimius Severus. It included the Baths of Septimius Severus (Latin: Balneum Palatii). All that remains of the building are the imposing brick substructures at the corner of the hill, which created an artificial platform at the same level as the palace of Domitian, extending it, since the emperors had run out of space on the hill. There are very few remains of the building itself, which was then built on the terrace under the substructures. It had a view of Rome from the Circus Maximus and the Aventine Hill to the Caelian Hill and the Baths of Caracalla. They were part of an imperial baths complex or thermae, now visible in the remains below the exedra of the Stadium Palatinum, which may have been built under Domitian and which was rebuilt by Maxentius. They were fed by a branch of the Aqua Claudia, which spanned the valley between the Palatine Hill and the Caelian Hill and whose arches are still visible. On the side facing the via Appia, Septimius Severus commissioned an impressive three-level facade akin to the scaenae frons in a theatre, with fountains and colonnades. This became known as the Septizodium. It is said that the emperor monumentalised this side of the building to impress his fellow Africans, who would arrive in Rome along the via Appia. The Septizodium's remains were demolished in the 16th century and it is only known from Renaissance drawings.

Circo Massimo is a station on Line B of the Rome Metro. It was opened on 10 February 1955 and is sited at the east end of the Circus Maximus, after which it is named, near the headquarters of the FAO, originally built as the Ministero delle Colonie. Until 2002 the Obelisk of Axum also stood near the station. It has two separate exits on either side of the viale Aventino.

The FAO Building (Italian: Palazzo FAO, literally "FAO Palace") is the international headquarters of the Food and Agriculture Organization (FAO), located in the San Saba rione of Rome, Italy. Originally built under the Fascist government of Italy in the 1930s to be the seat of the Ministry of Italian Africa, the building was repurposed after World War II to be the headquarters of the then-new United Nations' agricultural agency, the FAO. The building is located the in one of the most scenic parts of Rome, southeast of the Aventine Hill, and overlooking the Baths of Caracalla and the Circus Maximus.

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 Castra Peregrina ("camp of the strangers") was a castrum (a military barracks) in Rome situated on the Caelian Hill. It was occupied by various military units during the later part of the Roman Empire.

The David Lubin Memorial Library is the main library of the Food and Agriculture Organization of the United Nations (FAO). Its world-renowned collection consists of technical material related to food, nutrition, agriculture, forestry and fisheries, with emphasis on developing countries. The core of its historical collection is the library of the International Institute of Agriculture (IIA), whose assets were entrusted to FAO when the IIA was disbanded in 1946.

The Villa Celimontana (previously known as Villa Mattei) is a villa on the Caelian Hill in Rome, best known for its gardens. Its grounds cover most of the valley between the Aventine Hill and the Caelian.

The Church of San Bonaventura al Palatino is a small 17th century church building in Rome built on Via Marco Colidio the Palatine Hill. It is a Franciscan monastery church built by Francesco Barberini on the request of the Blessed Bonaventura Gran and was completed in 1689.

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).