Pandataria is best known as the island to which the emperor Augustus banished his daughter Julia the Elder in 2 BC, as reaction to her excessive adultery, where she was to spend five years, and to which Tiberius banished his grandniece Agrippina the Elder in 29 AD. She perished, probably of malnutrition, on October 18, 33 AD. After Agrippina's son Gaius (better known as Caligula) became emperor in 37 AD, he went to Pandataria to collect her remains and reverently brought them back to Rome. Agrippina's youngest daughter, Julia Livilla was also exiled to Pandateria twice: the first time by her brother Caligula for plotting to depose him and the next time by her uncle, the emperor Claudius, at the instigation of his wife, Messalina, in 41 AD. Sometime later, she was discreetly starved to death there and her remains were probably brought back to Rome when her sister Agrippina the Younger became influential as the emperor's wife. Another distinguished lady of the Julio-Claudian dynasty, Claudia Octavia, who was the first wife of the emperor Nero, was banished to Pandateria in 62 AD and executed on the orders of her husband.
This is also the island to which St. Flavia Domitilla, for whom the eponymous catacombs in Rome are named and who hid many saints (or recovered their remains when they were martyred), was banished. She was the granddaughter of Emperor Vespasian. She may have died there.
A prison camp was created under the Bourbons and restructured under Benito Mussolini on the island of Santo Stefano, where up to 700 opponents, including 400 communists, were incarcerated between 1939 and 1943. One of them was Altiero Spinelli who wrote there a text now known as the "Ventotene Manifesto", promoting the idea of a federal Europe after the war.
During World War II, the island also served as home to a 114 man German garrison that defended a key radar station. On the night of September 8, 1943, an American PT boat silently slipped into Ventotene's
