A
templon (from
Greek τέμπλον meaning "temple", plural
templa) is a feature of
Byzantine architecture that first appeared in Christian churches around the fifth century AD and is still found in some
Eastern Christian churches. Initially it was a low barrier probably not much different from the
altar rails of many Western churches. It eventually evolved into the modern
iconostasis, still found in Orthodox churches today. It separates the laity in the
nave from the priests preparing the
sacraments at the
altar. It is usually composed of carved wood or marble colonnettes supporting an
architrave (a beam resting on top of columns). Three doors, a large central one and two smaller flanking ones, lead into the
sanctuary. The templon did not originally obscure the view of the altar, but as time passed,
icons were hung from the beams, curtains were placed in between the colonnettes, and the templon became more and more opaque. Sometime between the 11th and 14th centuries, icons and proskynetaria began to be placed in the intercolumnar openings on the templon. After the reconquest in 1261, carving on the medieval templon approached
sculpture in the round. The first ceiling-high, five-leveled Russian iconostasis was designed for the Cathedral of the Annunciation in
Moscow Kremlin by
Theophanes the Greek in 1405, and soon copied by his assistant
Andrey Rublyov in the
Cathedral of the Dormition in
Vladimir in 1408.