Medieval architecture, its origins and development, with lists of monuments and bibliographies (1909)
Porter, Arthur Kingsley, 1883-1933 · New York, The Baker and Taylor Company · leaf 140
to that of the eastern sanctuary. Theselateral entrances are not found at Rome, a fact which mayexplain the rarity of double-apsed churches there. The earliest apses had no windows, but in the V centurythey were occasionally pierced by one, two, or three openings. 1 Howard Crosby Butler,… … « -S THE SANCTUARY Later, the idea in a few instances was carried to such an extentthat certain apses became practically open arcades of windows. Internally, the space within the apse, known as the bema,was reserved for the higher clergy. It was lined with a seriesof seats formed like steps rising…
Architecture, Medieval
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