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 curved 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 work Διακονικόν, is the place where the sacred vestments, missals and furnishings are kept. It is also the place where the dressing of the officiants takes place.