This monument, which stands 14 meters tall, was restored almost entirely from scratch. It is an integral part of the Stadium, to which it is connected both architecturally and functionally. It takes the form of a Doric-style temple with four columns on the facade, constructed entirely of local limestone. It is located on the south side of the stadium, built on a rectangular base that protrudes from the wall like a bastion. The base appears stepped. It is faced with alternating courses of thicker poros stone blocks and thinner limestone blocks. The core is filled with small, irregular stones in a loose mixture of lime mortar.

The façade of the Heroon faces north, toward the interior of the stadium’s running track. Among the scattered massive architectural members of the Heroon are marble fragments belonging to a reclining sarcophagus, in the imago clipeata style from the time of Nero, featuring a relief bust of a man wearing a breastplate. Bases of funerary stelae and fragments of various sizes from funerary shrines were found scattered at various points along the sides of the podium. All the evidence points to the conclusion that this temple-like structure was a family hero-mausoleum, following in the tradition of similar examples from Asia Minor. This particular structure belonged to the politically and economically powerful Saithid family. Distinguished members of the family were buried here and received heroic honors from the time of its construction in the 1st century CE and thereafter, at least until the reign of Emperor Lucius Verus (161–169 CE).