Bema
A bema is an elevated platform used as an orator's podium. The term can refer to the raised area in a sanctuary. In Jewish synagogues, where it is used for Torah reading during services, the term used is bima or bimah.
Ancient Greece
The Ancient Greek bēma means both 'platform' and 'step', being derived from bainein. The original use of the bema in Athens was as a tribunal from which orators addressed the citizens as well as the courts of law, for instance, in the Pnyx. In Greek law courts the two parties to a dispute presented their arguments each from separate bemas.By metonymy, bema was also a place of judgement, being the extension of the raised seat of the judge, as described in the New Testament, in and, and further, as the seat of the Roman emperor, in, and of God, in, when speaking in judgment.
Judaism
In Judaism, synagogues contain a bimah, a large, raised, reader's platform, where the Torah scroll is placed to be read. The term is post-biblical Hebrew, and almost certainly derived from the Ancient Greek word bema. However, a link to the Biblical Hebrew bama, 'high place' has also been suggested.The bimah is raised to demonstrate the importance of the Torah reader, and to make it easier to hear the recitation of the Torah. Over time, it became a standard fixture in synagogues, where the weekly Torah portion and haftara are read. In Orthodox Judaism, the bimah is located in the center of the synagogue, separate from the Torah ark. In other branches of Judaism, the bimah and the ark are joined together.
Christianity
The ceremonial use of a bema carried over from Judaism into early Christian church architecture. It was originally a raised platform with a lectern and seats for the clergy, from which lessons from the Scriptures were read and the sermon was delivered. In Western Christianity the bema developed over time into the chancel and the pulpit.In Byzantine, Armenian Rite, West Syriac and Alexandrian Rites of Eastern Christianity bema generally remains the name of the platform which composes the sanctuary; it consists of both the area behind the iconostasion and the platform in front of it from which the deacon leads the ektenias together with the ambo from which the priest delivers the sermon and distributes Holy Communion. It may be approached by one or several steps. The bema is composed of the altar, the soleas, and the ambo. Orthodox laity do not normally step up onto the bema except to receive Holy Communion.