holy of holies; sanctum sanctorum
Refers to the innermost and most sacred area of the ancient Jewish Temple in Jerusalem, accessible only by the high priest on Yom Kippur. Used in biblical and theological contexts.
Only the high priest could enter the holy of holies once a year.
From 至 (utmost) + 聖 (holy) + 所 (place). A direct translation of the biblical term 'Holy of Holies'.