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Letter
"I" Glossary
icon
Images for devotional use in the church, principally
in the Byzantine church, designed according to prescribed
formulas of composition and subject (Christ, the Virgin, saints,
and the great feasts), most commonly on movable panels, usually
painted in tempera and with a gold background. Mosaic was
also used for icons. The form was also popular in the Russian
church.
iconostasis
Large wall-sized screens in Byzantine churches located to
separate the sanctuary including the high altar from the nave,
usually pierced by three doors and sometimes covered with
a number of individual icons.
illumination
Ornamental or narrative paintings illustrating secular and
religious manuscripts and sometimes early printed books.
impost
block
Architectural elements, usually in the shape of a truncated
inverted pyramid, placed between capitals and the arches that
spring from them.
intercolumniation
The distance between columns in an arcade or colonnade.
interlace
General term to describe any one of a variety of decorative
patterns, both painted and carved, composed of interweaving
lines or bands. The most famous examples of interlace design
occur in Hiberno-Saxon manuscript illumination (Book of Kells).
intrados
Inner curves or faces of arches or vaults forming the concave
underside. Cf. extrados.
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