Vast Roman public baths, or thermae, built in Rome between AD 212 and 216, during the reign of the Emperor Caracalla. The baths remained in use until the 6th century when the complex was sacked by the Ostrogoths during the Gothic War, destroying the hydraulic installations. The Caracalla bath complex of buildings was more a leisure centre than just a series of baths. The "baths" were the second to have a public library within the complex. The bath complex covered approximately 25 hectares (33 acres).