1) "head-quarters" in a Roman camp, the tent of the commander-in-chief
 2) the palace in which the governor or procurator of a province
    resided, to which use the Romans were accustomed to appropriate
    the palaces already existing, and formerly dwelt in by kings or
    princes; at Jerusalem it was a magnificent palace which Herod the
    Great had built for himself, and which the Roman procurators
    seemed to have occupied whenever they came from Caesarea to
    Jerusalem to transact public business
 3) the camp of the Praetorian soldiers established by Tiberius