Caracalla was a Roman Emperor who ruled from 198 to 217 AD. He was born in 188 AD and was the son of Emperor Septimius Severus. Caracalla is best known for granting Roman citizenship to all free men in the empire through the Constitutio Antoniniana in 212 AD, which significantly expanded the rights of many people. He is also famous for the construction of the Baths of Caracalla, a large public bathing complex in Rome that showcased the grandeur of Roman architecture. His reign was marked by military campaigns and increasing autocracy, leading to his assassination in 217 AD.