Caracalla (Latin: Marcus Aurelius Severus Antoninus Augustus; 4 April 188 – 8 April 217) is Roman emperor from 198 to 217.

The eldest son of Septimius Severus, for a short time he rules jointly with his younger brother Geta until he has him murdered in 211.

Caracalla is remembered as one of the most notorious and unpleasant of emperors because of the massacres and persecutions he authorized and instigated throughout the Empire.

Caracalla's reign is also notable for the Constitutio Antoniniana (also called the Edict of Caracalla), granting Roman citizenship to all freemen throughout the Roman Empire for the purpose of increasing tax revenue, according to historian Cassius Dio.

He is also one of the emperors who commissioned a large public bathhouse (thermae) in Rome.

The remains of the Baths of Caracalla are still one of the major attractions of the Italian capital.