Rome, Temple of Venus and Roma site, Colloseum and Arch of Constantine in background.

Rome, Temple of Venus and Roma site in the evening, Colloseum and Arch of Constantine in background.

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, it was dedicated to the goddesses Venus Felix ("Venus the Bringer of Good Fortune") and Roma Aeterna ("Eternal Rome"). The architect was the emperor Hadrian and construction began in 121. It was officially inaugurated by Hadrian in 135, and finished in 141 under Antoninus Pius. In order to build the temple, erected on the remnants of the porticoed vestibule to Emperor Nero's Domus Aurea, the Colossus of Nero was moved and placed near the amphitheatre, which shortly afterwards became known as the Colosseum. Damaged by fire in 307, it was restored with alterations by the emperor Maxentius. According to the ancient historian Ammianus Marcellinus the temple was among the great buildings of Rome which astonished the Emperor Constantius II on his visit to the city in 357.
Further restoration was performed under Eugenius, a short-lived usurper (392–394) against Theodosius I, whose policy was the restoration of Pagan cults and temples. However, as with many of Rome's majestic ancient buildings the temple was later targeted for its rich materials. In 630 Pope Honorius I with the consent of the Emperor Heraclius, removed the gilt-bronze tiles from the roof of the temple for the adornment of St. Peter's.
A severe earthquake at the beginning of the 9th century is believed to have destroyed the temple. Around 850 Pope Leo IV ordered the building of a new church, Santa Maria Nova, on the ruins of the temple. After a major rebuilding in 1612, this church was renamed Santa Francesca Romana, incorporating Roma's cella as the belltower. A somewhat fanciful vedute engraving by Giovanni Battista Mercati depicts the site in 1629. The vast quantity of marble that once adorned the temple has all but disappeared due to its use as a raw material for building projects from the Middle Ages onwards. The Italian archaeologist Rodolfo Amedeo Lanciani makes reference to his discovery of a lime kiln in close proximity to the temple in his work The Destruction of Ancient Rome.
Presently only a few columns surrounding remain standing in their original positions, while others that have gone missing have been replaced by buxus trees.

more on https://en.wikipedia.org/wiki/Temple_of_Venus_and_Roma , https://en.wikipedia.org/wiki/Colosseum , https://en.wikipedia.org/wiki/Arch_of_Constantine