Encyclopædia Britannica, Ninth Edition/Acœmetæ
For works with similar titles, see Acoemetae.
Acœmetæ (ἀκοίμητος, sleepless), an order of monks instituted by Alexander, a Syrian, about the middle of the 5th century. Founding on the precept, Pray without ceasing, they celebrated divine service uninterruptedly night and day, for which purpose they divided themselves into three sections, that relieved each other in turn. The chief seat of the Acœmetæ was the cloister Studium at Constantinople, whence they were sometimes called Studites. Having adopted the monophysite heresy, they were put under the Papal ban about the year 536.