sanctum sanctorum

 
Pronunciation: /saŋ(k)ˈtɔːrəm/

noun (plural sancta sanctorum or sanctum sanctorums)

  • the holy of holies in the Jewish temple.

Origin:

late Middle English: Latin sanctum (see sanctum) + sanctorum 'of holy places', translating Hebrew qōḏeš haqqŏḏāšīm 'holy of holies'