The colossal Constantinian bronze portrait in the Capitoline Museum stands out as a unique example of Roman, large-scale portraiture. It is a rare bronze portrait of colossal size, which included a lot of material of a kind which was usually remolded into exchangeable goods in Late Antiquity. It was constructed from separately cast parts, and with a close look, there are traces of retouching and alterations. The reuse was undertaken by way of highly skilled refashioning techniques. In the present paper, I venture to suggest that the bronze colossus originally portrayed Nero (AD 54-68), thereafter Commodus (AD 177-192), before it was given its present appearance in the early fourth century.