The office of cubicularius, or chamberlain, was named after the bedchamber or living quarters in which he originally served. The office was founded in the Roman Republic and had become a regular fixture by the imperial period, when a large team of
cubicularii served Roman emperors in their living quarters, each group of ten being headed by a decurion (Collins, 2008, 391–392). This intimacy provided plenty of opportunity for treachery, and Domitian is reported to have been assassinated by a decurion of the chamberlains (
decurio cubiculariorum, Suet.
Dom. 17.2; see Collins, 2008, 38…