Lewis & Short

sanctŭārĭum, ii, n. [sanctus] (postAug. for sacrarium).

  1. I. A place for keeping sacred things, a shrine, sanctuary, Aggen. Limit. p. 61 Goes.; Vulg. Dan. 8, 13 et saep.
  2. II. The private cabinet of a prince: Mithridatis, Plin. 23, 8, 77, § 149; Sicul. Fl. p. 16 Goes.; Inscr. Orell. 2388.