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View looking west at the Temple of Venus and Roma from the Colosseum. The full width of the platform that it was built upon is visible in the center of the image. Note the 8 grated but open entrances to the under–the–platform chambers. Note also the columns on the left (south) and right (north) sides of the platform. Check here for a detailed view of the apse of the temple.
On the left (south) side of the image the Palatine Hill is visible and between it an the apse of the temple the top of the Arch of Titus is also visible.
This temple was built on a platform at the east end of the Roman Forum where Nero's Domus Aurea use to stand. It was the largest temple in Rome. It was dedicated in A.D. 135 and may have been designed by Hadrian.
These visible remains date from a rebuild of the temple by the Emperor Maxentius (r. 306–312). It may have been the last functioning pagan temple in Rome until it was closed by Theodosius in A.D. 391.