April 4
Caracalla born as Lucius Septimius Bassianus to Septimius Severus and Julia Domna.
October
Septimius Severus installs Caracalla as his successor and has the Senate declare Clodius Albinus an enemy.
January 28
Septimius Severus proclaims Caracalla and his brother Geta as co-emperors.
Caracalla inducted into the Arval Brethren, a body of priests who offered annual sacrifices to the gods for good harvests.
Caracalla serves as Roman consul with his father, Septimius Severus.
April
Caracalla forced to marry Fulvia Plautilla, whom he hated.
Caracalla serves as Roman consul for the second time, this time with his brother Geta.
Caracalla banishes his wife, Plautilla.
January 28
Caracalla celebrates the tenth year of his rule.
Caracalla serves as consul for the third time with Geta, his second.
February 4
Septimius Severus dies at Eboracum while on campaign in the north of Britain. Caracalla and Geta become co-emperors.
December 26
Julia Domna arranges a conciliation meeting between her sons and co-emperors Caracalla and Geta. There, Geta is assassinated by the Praetorian Guard.
Construction of the Baths of Caracalla begins.
Caracalla proclaims the Constitutio Antoniniana, which gives all free men in the Roman Empire Roman citizenship.
Caracalla erects a temple to Serapis on the Quirinal Hill.
Caracalla leaves Rome and accompanies troops against the Alamanni.
April
Caracalla heads to the eastern provinces.
Caracalla visits Alexandria and feels insulted by the locals, so he orders all men of arms-bearing age to be executed.
Caracalla introduces the antoninianus, worth two denarii.
Emperor Caracalla holds funeral games at the Tomb of Achilles at Achilleion on his way to Parthia.
Partial inauguration of the Baths of Caracalla.
April 8
Caracalla stabbed to death by Justin Martialis, who was upset at being denies a promotion to centurion.