Colonna gardens, Rome, statue of Marcantonio II Colonna as Roman emperor.

Rome, travertine bridge from the Palazzo Colonna cross the Via della Pilotta to the southern end of the secluded Colonna gardens, formerly the ruins of the Temple to Serapis, built by Emperor Caracalla. Modern statue of Marcantonio Colonna as Roman emperor at center. The ruins and were pulled down by the Colonna in the XVIIth century; decorative elements were used to embellish the gardens and the palazzo. To get a view of what is left of the gardens (part of which was sold) it is necessary to go on the first floor of the buildings on the rear of Palazzo Colonna.

One of the remaining decorations of the gardens is a monument to the family hero, Marcantonio Colonna who fought at Lepanto in 1571.
In 1713, almost a century after the completion of the gardens, Filippo II Colonna celebrated Marcantonio with a statue where his ancestor is portrayed as a Roman emperor, made by Nicholas Pippi of 1595.

Marcantonio II Colonna (sometimes spelled Marc'Antonio; 1535 – August 1, 1584), Duke of Tagliacozzo and Duke and Prince of Paliano, was an Italian general and admiral. At the Battle of Lepanto (October 7, 1571), his admiral ship was protagonist of the decisive victory of the Christian League against the Ottoman fleet. On his return to Rome, Pope Gregory XIII confirmed him Captain General of the Church.

more on https://en.wikipedia.org/wiki/Palazzo_Colonna , https://en.wikipedia.org/wiki/Marcantonio_Colonna , https://en.wikipedia.org/wiki/Battle_of_Lepanto