The Diaconicon is a sacred and ritual space located in the presbytery, specifically in the right apse, while the Prothesis is located in the left apse. The Prothesis, Diaconicon and Bema constituted the three volumes of the presbytery, according to a solution widely used in early medieval churches. The combination of the Diaconicon and Prothesis is called pastophoria. The Diaconicon, from the Greek Διακονικόν, is the place where the sacred vestments, missals and furnishings were kept, as well as being the place where the dressing of the deacons and the officiants took place.
