14-37 e. Kr. Tiberius är förste kejsare av den julisk-claudiska ätten.
A grim and unsociable military man, Tiberius was rarely popular in Rome and spent much of the last decade of his life on the remote Isle of Capri. For a time he ruled in absentia through his lieutenant, Lucius Aelius Sejanus, prefect of the Praetorian Guard. (He had Sejanus executed in 31 A.D., fearing that Sejanus was plotting to overthrow him.) Tiberius married twice but had no children of his own at the time of his death; he was succeeded by Caligula.