ICONOCLASTS, breakers of images, a name applied in the 8th and 9th centuries to the opponents of the use of images in Christian worship. (See ROMAN EMPIRE, LATER.) At the period of the Reformation (q.v.) the name was given to those who advocated the destruction of images in the churches. ICONOSTASIS, the screen in a Greek, Russian or Armenian church, which encloses the sanctuary. It is generally of masonry, high enough to reach the spring of the vault and extends into the body of the church as far as the easternmost nave pier. In its nave front there are usually three doors. The face of the screen is often decorated with many tiers of small arcades ; each arch encloses the representation of a saint. In Russian churches only the hands, feet and faces of the painted representation or ikon are exposed; the rest of the panel is covered with elaborate, en graved, embossed metal work. In earlier times in Greece, however, the entire image was painted.