baptism candle catholic christian church liturgical paschal religion Armenian Armenian-Orthodox art art-history artistic-style Christian-art composition conventional depiction description descriptive devotional distinctive Eastern-Orthodox-Church eikon elements faith gold highly-stylized icon iconography ikon illustration image interpretative Oriental-Orthodoxy orthodox painted painting religious religious-devotion Sacred style stylistic symbolic symbolism symbols veneration εἰκών apse architecture germany Gernrode Gero historical romanesque wall window