Reber, Franz von, 1834-1919, Clarke, Joseph Thacher, d. 1920 · New York : Harper & Bros. · leaf 64
number andposition with the arcades beneath them. The openings were origi- BASILICAL CONSTRUCTION. 29 nally closed by thin slabs of marble, perforated with circular holesin order to increase the supply of light which could not have beensufficiently provided by even the most translucent limestone;… … Fig. 16.—View of the interior of S. Prassede. glass, although mentioned in the fourth century (Lactant. de opif.Dei 8), was seldom used by the early Christians, and sheets of trans-parent stone (fenestrae gypseae), were not much more common.Windows of colored glass were probably not introduced…
Art, Medieval
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