+A **voussoir** is a precisely cut, wedge-shaped stone forming a critical component of an [Arch](/wiki/arch) or vault. Each piece works in concert, channeling compressive forces to achieve structural integrity and self-support, especially around a central [Keystone](/wiki/keystone).
+## See also
+- [Vault](/wiki/vault)
+- [Masonry](/wiki/masonry)
+- [Buttress](/wiki/buttress)
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