Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[403] Now on the north side [of the temple] was built a citadel, whose walls were square, and strong, and of extraordinary firmness. This citadel was built by the kings of the Asamonean race, who were also high priests before Herod, and they called it the Tower, in which were reposited the vestments of the high priest, which the high priest only put on at the time when he was to offer sacrifice. These vestments king Herod kept in that place; and after his death they were under the power of the Romans, until the time of Tiberius Caesar; under whose reign Vitellius, the president of Syria, when he once came to Jerusalem, and had been most magnificently received by the multitude, he had a mind to make them some requital for the kindness they had shewn him; so, upon their petition to have those holy vestments in their own power, he wrote about them to Tiberius Caesar, who granted his request: and this their power over the sacerdotal vestments continued with the Jews till the death of king Agrippa; but after that, Cassius Longinus, who was president of Syria, and Cuspius Fadus, who was procurator of Judea, enjoined the Jews to reposit those vestments in the tower of Antonia, for that they ought to have them in their power, as they formerly had. However, the Jews sent ambassadors to Claudius Caesar, to intercede with him for them; upon whose coming, king Agrippa, junior, being then at Rome, asked for and obtained the power over them from the emperor, who gave command to Vitellius, who was then commander in Syria, to give it them accordingly. Before that time they were kept under the seal of the high priest, and of the treasurers of the temple; which treasurers, the day before a festival, went up to the Roman captain of the temple guards, and viewed their own seal, and received the vestments; and again, when the festival was over, they brought it to the same place, and showed the captain of the temple guards their seal, which corresponded with his seal, and reposited them there. And that these things were so, the afflictions that happened to us afterwards [about them] are sufficient evidence. But for the tower itself, when Herod the king of the Jews had fortified it more firmly than before, in order to secure and guard the temple, he gratified Antonius, who was his friend, and the Roman ruler, and then gave it the name of the Tower of Antonia.