Cubiculum
Cubiculum usually means a sleeping and dwelling room in a Roman house [DOMUS], but also applied to the pavilion or box in which the Roman emperors were accustomed to witness the public games. (Suet. Nero 12; Plin. Paneg. 51.) It appears to have been so called, because the emperors were accustomed to recline in the cubicula, instead of sitting, as was anciently the practice, in a sella curulis. (Ernesti, ad Suet. l.c.)
From William Smith (ed.), Dictionary of Greek and Roman Antiquities. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.