sanctum

[ sangk-tuh m ]

/ ˈsæŋk təm /

a sacred or holy place.

an inviolably private place or retreat.

Origin of sanctum

1570–80; noun use of neuter of Latin sānctus; see Sanctus

One afternoon the superintendent stopped his car at the Junction and called the little man into his sanctum.

Nancy McVeigh of the Monk Road |R. Henry Mainer
"I hope I am not interrupting you," he said, as he entered the sanctum.

Punch, or the London Charivari, Vol. 98, 1890.05.10 |Various
Error has no hobby, however boldly ridden or brilliantly caparisoned, that can leap into the sanctum of Christian Science.

No and Yes |Mary Baker Eddy
When Baalim was left in charge of Dr Tom's sanctum no man dare enter it.

Settling Day |Nat Gould

But he let me pass, and I ascended one of the profane lateral stairways and treated myself to a glimpse of the Sanctum Sanctorum.

Italian Hours |Henry James

sanctum

/ (ˈsæŋktəm) /

a sacred or holy place

a room or place of total privacy or inviolability

C16: from Latin, from sanctus holy