Encyclopedia
Dome
Dome - a semispherical covering of a building (or its part) of circular, square, or polygonal shape. Domes also refer to multi-part closed vaults. The term "dome" is also applied to the external coverings of churches
Source: "SP 31-103-99. Buildings, Structures and Complexes of Orthodox Churches"
(adopted by the Decree of the Russian Federal Service for Supervision of Construction dated December 27, 1999 No. 92)