Encyclopedia
throne
The throne (pristol) is a four-legged table placed in the center of the altar. In cathedrals and large churches, a canopy (kiyorium) is installed above the throne
Source: "SP 31-103-99. Buildings, Structures and Complexes of Orthodox Churches"
(adopted by Decree of the State Construction Committee of Russia dated December 27, 1999 No. 92)