Keystone (architecture)
From The Art and Popular Culture Encyclopedia
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A keystone (or capstone) is the wedge-shaped stone at the apex of a masonry arch or typically round-shaped one at the apex of a vault. In both cases it is the final piece placed during construction and locks all the stones into position, allowing the arch or vault to bear weight.
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See also
- Architectural sculpture
- Coping (architecture)
- List of classical architecture terms
- Oculus compression ring
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