Tiberius Caesar Augustus (born Tiberius Claudius Nero) was the second Roman Emperor, from AD 14 until his death in 37. He was the son of Livia Drusilla and her first husband Tiberius Nero. His mother's second husband was Augustus, who was the Princeps (Translates to "first-citizen" or "first-leader"). Tiberius grew up in his father's house. When his father died he went to live with his mother, his stepfather and his younger stepsister, Julia. Livia wanted to advance her sons as far as possible and used her position as Augustus' wife to advance Tiberius' career.
He married Vipsania, the daughter of Marcus Vipsanius Agrippa, Augustus' greatest general with whom he has one son. Agrippa was also the husband of Tiberius' stepsister Julia. When Agrippa died, Tiberius and Julia were forced by their parents to marry each other. Although the marriage was reportedly peaceful at first the death of their young son Tiberillus caused the marriage to turn cold. Julia refused to acknowledge Tiberius as her equal and very soon she began petitioning to her father for a divorce. When Augustus refused, Tiberius and Julia seperated. Tiberius left for Rhodes and Julia allied herself with Iullus Antonius, the son of Mark Antony who allegedly became her lover. Julia was later exiled and Iullus executed, both for adultery and treason.
Tiberius returned to Rome following the sudden death of his stepson, Lucius Caesar, the second son of Julia and Agrippa. Augustus finally adopted him when Tiberius's other stepson, Gaius Caesar, (Julia and Agrippa's eldest son and Augustus' principle successor), was killed. However, Augustus also adopted his youngest grandson, Agrippa Postumus. Postumus was exiled and later murdered following Tiberius' succession. Julia committed suicide following her father's death.
As an emperor, Tiberius wasn't well liked. A majority of the Roman people preferred Tiberius' nephew Germanicus who was the husband of Julia's youngest daughter, Agrippina. For the majority of Tiberius' rein, there was friction between him and his stepdaughter. Agrippina was the only living direct relative of Augustus left alive as her mother had killed herself, her three brothers had all died and her elder sister Julilla was in exile and starved to death in 29 BC. Tiberius later exiled Agrippina (with the help of his right-hand man Sejanus) to the same island that Julia had been exiled to and she evenutally committed suicide by refusing to eat. It is said that Tiberius ordered her guards to force her to eat, violently, and she lost an eye from the impact. The two elder sons of Agrippina, Drusus and Nero, were both killed also, one exiled and the other locked away and starved to death. The only one of Agrippina's sons who survived was Gaius "Caligula", who Tiberius made his heir.
Towards the end of Tiberius' rein, his pretorian guard Sejanus plotted to have him killed in favour of the Julians. He conspired with Livilla, Tiberius' niece, to overthrow him in favour of either Caligula or his grandson Tiberius Gemellus. However, the plot was foiled when Sejanus' wife died stating in her will that Sejanus was plotting to kill him. Tiberius had all Sejanus' supporters (mostly supporters of Tiberius' ex-wife Julia's family) and Sejanus also was executed.
Tiberius was emperor when Jesus Christ was crucified, but he had no part in this action. When Jesus asked for a coin and asked whose face was on it, it would have been the face of Tiberius that was seen.