De Ceremoniis
In the reign of Romanos II () the post was split, with a "Domestic of the West" (, ) and a "Domestic of the East" (, ) being created for operations in Europe and Asia respectively. The command of the Schools regiment then passed to the Domestic's deputy, the , although it appears that by that time there were several officers occupying that position at the same time. The ceremony for the Domestic's appointment is described in the "De Ceremoniis" (II.3); the same work describes his duties and role in court ceremonies.