The Prothesis is a sacred and ritual space located in the presbytery, specifically in the left apse, while the Diaconicon is located in the right 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. Thanks to the presence of a small table, the Prothesis is the place where the sacred objects, with which the liturgy of bread and wine is celebrated, are kept.