In architecture, a concha is a plain semi-dome of an apse; sometimes the term is used to describe the entire apse.
a covered corridor (especially one extending along the wall of a building and supported with arches or columns)
bound on both sides , is an illustrated book that tells a religious legend or explains a religious ritual.
a picture or relief carving on three panels, typically hinged together side by side and used as an altarpiece; a set of three associated artistic, literary, or musical works intended to be appreciated together
a painting or carving (especially an altarpiece) on two panels (usually hinged like a book)
in a domed building, an inwardly curving triangular section of the vaulting that provides a transition from the round base of the dome to the supporting piers - Hagia Sophia.
refers to the dual role of the head of State and leader of the Church in which the temporal ruler extends his own powers to ecclesiastical and theological matters.