The temple was erected on the remains of Emperor Nero's Domus Transitoria, and subsequent Domus Aurea, and first the Colossus of Nero was moved and placed near the amphitheatre, which shortly afterwards became known as the Colosseum. An elaborate domed rotunda from the Domus Transitoria is still intact beneath the temple, an extravagant architectural design which included marble-lined pools and paving in multicoloured opus sectile.[2]