English: This statue of Mars Ultor, found in the ruins of the Forum of Nerva in Rome during the 16th century, is most likely dated to the early 2nd century AD due to its style (either the end of Trajan's reign or beginning of Hadrian's). It is a copy of an Augustan-era original, which itself was based on a Hellenistic Greek model from the 4th century BC. It was once believed to depict the famous Hellenistic king Pyrrhus of Epirus, but this idea was overturned in the 18th century. It was eventually acquired by Pope Clemente XII and placed at the Capitoline Hill by 1740.
Source: Capitoline Museums. "Colossal statue of Mars Ultor also known as Pyrrhus - Inv. Scu 58." Capitolini.info. Accessed 8 October 2016.