Thomas Henry Poole,
Catholic Encyclopedia
(1913)
“ The Holy of Holies, or Sanctum Sanctorum, of the temple of Solomon was of the nature of the pagan adytum; none but the high priest being admitted into it, and he but once a year. Among the Egyptians the secos was the same thing, and is described by Strabo. A well-preserved adytum that has come to our knowledge is in the little temple in Pompeii; it is raised some steps above the level of the temple itself, and is without light. In Christian architecture it sometimes signifies the chancel, or altar end of a church. ”

