Its location is unknown and no remains have been found, although a Temple to Hercules linked to Lucius Cornelius Sulla (the Herculem Sullanum) was noted as standing in the region of the Esquiline Hill during the late 4th century.
Ovid writes that it was to the west of the Circus Flaminius - it was probably built around the same time (221 BC).
[2][3] This consultation of the oracles and the epithet 'Custos' seems to imply it was built and/or rebuilt in response to a major crisis, though it is unknown what its nature was.
In 218 BC, the senate decreed a supplicatio in the Aedes Herculi.
The decemvirs ordered a statue to be set up in the temple of Hercules Custos in 189 BC.