American churches ... A series of authoritative articles on designing, planning, heating, ventilating, lighting and general equipment of churches as demonstrated by the best practice in the United States (1915)
Cram, Ralph Adams, 1863-1942, Baker, James McFarlan · New York, The American architect · leaf 74
AMERICAN CHURCHES … In the beginning altars were not ele- FIGURES IN REREDOS OF TRINITY CHAPEL, vated on steps, but were built flat on the BUFFALO, N. Y. pavement. In the fourth century they were raised one step above the sanctuary floor. It has become the custom, for Roman rite these crosses must have been anointed…
Church architecture · Church decoration and ornament
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.