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 144
at 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. > Howard Crosby Butler, Architecture… … a a if I1 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…
Architecture, Medieval
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