Mosaic. Putto on a seahorse. The Baths of Caracalla (Terme di Caracalla, Thermes de Caracalla, Caracalla-Thermen) were inaugurated in AD 216 during the reign of emperor Caracalla. The baths remained in use until the 6th century. The bath complex covered approximately 25 hectares. The complex is rectangular, measuring 337 by 328 meters. Rome, Italy.(2020).