ambo
The elevated pulpit used for preaching in the church nave.

chancel screen of presbytery
A short barrier between the bema and the nave. It had originally the form of a parapet that was later made of stone or of marble. It is generally an element of early Christian religious architecture, and it appears on ground plans either as a linear structure or forming a Π. It consists of small columns or pillars in the interspace of which slabs are inserted. Crosses and floral patterns are usually used for the relief decoration of the screen.

Hodegetria
Iconographic type of the Virgin Mary. The Virgin is depicted standing, slightly turning to the right of the viewer, holding in her arms the infant Jesus. The type was named so after an allegedly thaumaturgic icon of the Virgin Mary kept in the monastery of Hodegoi in Constantinople.

praepositos
(from lat. praepositus sacri cubiculi) The praepositos or praipositos (πραιπόσιτος του ιερού κουβουκλίου or του ευσεβεστάτου κοιτώνος) was a grand chamberlain by the Early Byzantine period the highest official, usually Eunuch, in the imperial service. After the 6th C. his functions were assumed by the parakoimomenos. The dignity involved in palace ceremony and disappeared until the end of 11th C.