An onion dome is a dome whose shape resembles an onion. Such domes are often larger in diameter than the tholobate (drum) upon which they sit, ...
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and their height usually exceeds their width. They taper smoothly upwards to a point.
It is a typical feature of churches belonging to the Russian Orthodox church. There are similar buildings in other Eastern European countries, and occasionally in Western Europe: Bavaria (Germany), Austria, and northeastern Italy. Buildings with onion domes are also found in the Oriental regions of Central and South Asia, and the Middle East. However, old buildings outside Russia usually lack the construction typical of the Russian onion design. The origin of the design is thought to be the native architectural style of early Rus´ tribes.
