The portrait represents Caesar in the prime of his vigor. The decisive features, rendered with close realism, and the proud and bitter expression at the same time, reveal the personality of the powerful leader. The work, of which the origin is unknown, was part of the Museum of the Benedictine Fathers of the Abbey of San Martino delle Scale, whose collection was acquired by the Museum in the post-unitary period, following the confiscation of ecclesiastical property in 1866. It is a Tiberian age copy of an original executed around the middle of the 1st century BC.