San Sisto Vecchio

Santi Nereo ed Achilleo is a fourth-century basilica church in Rome, Italy, located in via delle Terme di Caracalla in the rione Celio facing the main entrance to the Baths of Caracalla. It has been the titular church of Cardinal Celestino Aós Braco since 28 November 2020. Note that the cemetery church of the catacomb of Saint Domatilla on the Appian Way, virtually lost in the early Middle Ages and rediscovered in the 1870s by the archaeologist Giovanni Battista de Rossi, carries the same dedication to Nereo and Achilleo.

Celio (Italian pronunciation: [ˈtʃɛːljo]) is the 19th rione of Rome, identified by the initials R. XIX, and is located within the Municipio I. Its coat of arms depicts the bust of an African, with an elephant headdress with golden tusks on a silver background, in memory of an African bust that was found in Via Capo d'Africa.

San Cesareo in Palatio or San Caesareo de Appia [san tʃeˈzaːreo de ˈappja] is a titular church in Rome, near the beginning of the Appian Way. It is dedicated to Saint Caesarius of Terracina, a 2nd-century deacon and martyr.

The Baths of Caracalla (Italian: Terme di Caracalla) in Rome, Italy, were the city's second largest Roman public baths, or thermae, after the Baths of Diocletian. The baths were likely built between AD 212 (or 211) and 216/217, during the reigns of emperors Septimius Severus and Caracalla. They were in operation until the 530s and then fell into disuse and ruin. Both during and since their operation as baths, they served as inspiration for many other notable buildings, ancient and modern, such as the Baths of Diocletian, the Basilica of Maxentius, the original Pennsylvania Station in New York City, Chicago Union Station and the Senate of Canada Building. Artworks recovered from the ruins include famous sculptures such as the Farnese Bull and the Farnese Hercules. Today the Baths of Caracalla are a tourist attraction.

Porta Metronia is a gate in the third-century Aurelian Walls of Rome. The gate is located in the southern section of the wall between Porta San Giovanni to the east and Porta Latina to the south.During the tenth century, beyond this gate was marshland called the Prata Decii or the Decenniae. At the end of the Middle Ages, the gate was closed and the entrance bricked up.Because of increasing traffic in the modern era, four main passages were created beside the original gate. The ground level around the gate has risen significantly through the ages, leaving the original passage partially underground.

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 Basilica of St. Stephen in the Round on the Celian Hill (Italian: Basilica di Santo Stefano al Monte Celio, Latin: Basilica S. Stephani in Caelio Monte) is an ancient basilica and titular church in Rome, Italy. Commonly named Santo Stefano Rotondo, the church is Hungary's "national church" in Rome, dedicated to both Saint Stephen, the first Christian martyr, and Stephen I, the sanctified first king of Hungary who converted to Christianity and promoted it in his kingdom. The minor basilica is also the rectory church of the Pontifical Collegium Germanicum et Hungaricum. As of 2005, the Cardinal Priest or titular S. Stephano is Friedrich Wetter.

The Minor Basilica of St. Mary in Domnica alla Navicella (Basilica Minore di Santa Maria in Domnica alla Navicella), or simply Santa Maria in Domnica or Santa Maria alla Navicella, is a Roman Catholic basilica in Rome, Italy, dedicated to the Blessed Virgin Mary and active in local charity according to its long tradition. It has been the titular church of Cardinal Marcello Semeraro since 28 November 2020.

The Fontana della Navicella (Fountain of the Small Ship) is a fountain built around a marble and travertine replica of an Ancient Roman sculpture, depicting a decorated Roman Galley, and erected in front of the church of Santa Maria in Domnica of Rome, Italy. While the statue is a copy (1518-1519) made by Andrea Sansovino on commission from Pope Leo X based on fragments discovered near the church.

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 Caelian Hill (; Latin: Collis Caelius; Italian: Celio [ˈtʃɛːljo]) is one of the famous seven hills of Rome.

The church of San Tommaso in Formis is a small church in Rome, situated on the Caelian Hill.