The cells and oratories are all of dry-built corbel construction.
en.wikipedia.org The ceremonial center has a tightly packed cluster of temples, colonnaded halls, oratories, shrines, sanctuaries, altars, and platforms (for oration, dancing, or stela display).
en.wikipedia.org However, his oratory was unpolished, and his parliamentary skills were weak, despite his considerable political experience.
en.wikipedia.org The monastery generally includes a place reserved for prayer which may be a chapel, church or temple, and may also serve as an oratory.
en.wikipedia.org Everything seems to point to this gallery having been an oratory or chapel.
en.wikipedia.org