The Temple of Mars (Latin: Aedes Martis in Circo) was a temple built on the campus Martius in Rome in the 2nd century BC, near the Circus Flaminius.
Consul Decimus Junius Brutus Callaicus vowed a temple to Mars in 138 BC and construction began after 135 BC, financed by loot from his campaign in Hispania. It was dedicated in 132 BC during his triumph. It was designed by Hermodorus of Salamis. It was restored in the late Republic but retaining the older building's plan and features.
Coordinates: 41°53′33″N 12°28′37″E / 41.8926°N 12.4770°E