Forum Romanum, Rome, eastern edge. Temple of Antoninus and Faustina, Temple of Valerius Romulus, Basilica of Maxentius and Constantine and House of the Vestals with elongated atrium.

Forum Romanum, Rome, eastern neighbourhood. Temple of Antoninus and Faustina, Temple of Valerius Romulus, Basilica of Maxentius and Constantine and House of the Vestals with it´s elongated atrium or court with a double pool. View from the northern Palatine Hill.

The Temple of Antoninus and Faustina is an ancient Roman temple in Rome, adapted to the church of San Lorenzo in Miranda. It stands in the Forum Romanum, on the Via Sacra, opposite the Regia.
The temple was begun in 141 AD by the Emperor Antoninus Pius and was initially dedicated to his deceased and deified wife, Faustina the Elder. When Antoninus Pius was deified after his death in 161 AD, the temple was re-dedicated jointly to Antoninus and Faustina at the instigation of his successor, Marcus Aurelius.
The building stands on a high platform of large peperino blocks. The later of two dedicatory inscriptions says, "Divo Antonino et Divae Faustinae Ex S.C." meaning, “To the divine Antoninus and to the divine Faustina by decree of the Senate.”
The ten monolithic Corinthian columns of its pronaos are 17 metres tall. The rich bas-reliefs of the frieze under the cornice, of garlanded griffons and candelabri, were often copied from the sixteenth through the nineteenth centuries.
The temple was converted to a Roman Catholic church, known as San Lorenzo in Miranda, perhaps as early as the seventh century, but it is only attested from the eleventh century Mirabilia Urbis Romae. "Miranda" may derive from the name of a benefactress. It was then thought that this was where St Lawrence had been sentenced to death.

The Temple of Romulus was dedicated by Emperor Maxentius to his son Valerius Romulus, who died in childhood in 309 and was rendered divine honours. A coin from 307 AD depicting the unusual round shape of the building, associates this building with Maxentius. It is possible that the temple was originally the temple of "Jupiter Stator" or the one dedicated to Penates, and that Maxentius restored it before the re-dedication.
The ancient Roman temple was Christianized and dedicated to Sancti Cosma et Damianus in 527, when Theodoric the Great, king of the Ostrogoths, and his daughter Amalasuntha donated the library of the Forum of Peace (Bibliotheca Pacis) and a portion of the Temple of Romulus to Pope Felix IV. The pope united the two buildings to create a basilica devoted to two Greek brothers and saints, Cosmas and Damian, in contrast with the ancient pagan cult of the two brothers Castor and Pollux, who had been worshipped in the nearby Temple of Castor and Pollux.

The Basilica of Maxentius and Constantine (sometimes known as the Basilica Nova - meaning "new basilica" - or Basilica of Maxentius) is an ancient building in the Roman Forum, Rome, Italy. It was the largest building in the Forum. The building's northern aisle is all that remains today.
Construction began on the northern side of the forum under the emperor Maxentius in 308, and was completed in 312 by Constantine I after his defeat of Maxentius at the Battle of the Milvian Bridge. The building rose close to the Temple of Peace, at that time probably neglected, and the Temple of Venus and Rome, whose reconstruction was part of Maxentius' interventions.
The building consisted of a central nave covered by three groin vaults suspended 39 meters above the floor on four large piers, ending in an apse at the western end containing a colossal statue of Constantine (remnants of which are now in a courtyard of the Palazzo dei Conservatori of the Musei Capitolini). The south and central sections were probably destroyed by the earthquake of 847. In 1349 the vault of the nave collapsed in another earthquake. The only one of the eight 20-meter-high columns, which survived the earthquake was brought by Pope Paul V to Piazza Santa Maria Maggiore in 1614. All that remains of the basilica today is the north aisle with its three concrete barrel vaults.

The House of the Vestal Virgins (Latin: Atrium Vestae) was the residence of Vestal Virgins, located behind the circular Temple of Vesta at the eastern edge of the Roman Forum, between the Regia and the Palatine Hill. The domus publicae where the Pontifex Maximus dwelled, was located near the Atrium until that role was assumed by the emperors.
The Atrium Vestae was a three-story 50-room palace in the ancient Roman Forum built around an elegant elongated atrium or court with a double pool. To the very east is an open vaulted hall with a statue of Numa Pompilius, the mythological founder of the cult.
The complex lay at the foot of the Palatine Hill, where a sacred grove that was slowly encroached upon lingered into Imperial times, when all was swept away by the Fire of Rome in 64. The House of the Vestals was rebuilt several times in the course of the Empire. After the dissolution of the College of the Vestals and the introduction of compulsory Christianity by Theodosius I in the late fourth century AD, the House of the Vestals continued to serve as a residence building. It now housed officials of the imperial court, and subsequently the papal court. Archaeological finds from this period include a hoard of 397 gold coins from the fifth century, and another 830 Anglo-Saxon coins dating from the 9th and 10th centuries. The site was abandoned in the 11th/12th century.

more on https://en.wikipedia.org/wiki/Temple_of_Antoninus_and_Faustina , https://en.wikipedia.org/wiki/Santi_Cosma_e_Damiano , https://en.wikipedia.org/wiki/Basilica_of_Maxentius , https://en.wikipedia.org/wiki/House_of_the_Vestals , https://upload.wikimedia.org/wikipedia/en/8/8f/Platner-forum-romanum-96-ssh.jpg , https://en.wikipedia.org/wiki/Roman_Forum , https://de.wikipedia.org/wiki/Datei:Map_of_downtown_Rome_during_the_Roman_Empire_large.png http://dlib.etc.ucla.edu/projects/Forum/reconstructions/ForumRomanum_1