Answer: adytum

AnswerCrossword Clue
ADYTUMSanctum.
ADYTUMInner sanctum
adytumthe most sacred or reserved part of any place of worship
adytuma sacred place that the public is forbidden to enter; an inner shrine.
adytumthe inner sanctuary of a temple
adytum(in ancient worship) a sacred place that the public was forbidden to enter; an inner shrine