Lowrie, Walter, 1868-1959 · New York, The Macmillan Company; London, MacMillan & Co. · leaf 60
■51====-1 … Fig. 4. — Section of the catacomb of Callistus. granular tufa the catacombs were excavated; the lithoid pre-sented insuperable difficulties to the excavation of narrowpassages, and in the sand a vertical wall could have beenmaintained only by a facing of brick. This difference in thecharacter of…
Christian antiquities · Christian art and symbolism · Church architecture · Church history -- Primitive and early church, ca. 30-600
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