Dome

A dome is a building or roof that usually looks like the upper half of a sphere.

As a roof feature, domes make many religious and government buildings stand out, because if someone is speaking to others inside or under a dome, the voice sounds louder. Also a dome makes it easier to identify an important building, for example a temple or a palace.

A large stadium with a roof over the playing field is often called a "dome". One example of that usage is the Metrodome.

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  St. Peter's basilica in Vatican City, with a dome, seen from outside.
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  The same dome, seen from inside
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  Golden dome above the mausoleum of Fatima Masumah in Qom
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  Gilded onion domes of the Cathedral of the Annunciation, Moscow Kremlin
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  Fiberglass dome cottage in Davis, California. This dome was built in 1972 and is part of the Baggin's End student housing cooperative.
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  The dome of the United States Capitol in Washington, D.C.

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