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KEYSTONE

Online Encyclopedia
Originally appearing in Volume V15, Page 769 of the 1911 Encyclopedia Britannica.
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KEYSTONE , the central See also:

voussoir of an See also:arch (q.v.). The Etruscans and the See also:Romans emphasized its importance by decorating it with figures and busts, and, in their triumphal See also:arches, projected it forward and utilized it as an additional support to the See also:architrave above. Throughout the See also:Italian See also:period it forms an important See also:element in the See also:design, and serves to connect the arch with the See also:horizontal See also:mouldings See also:running above it. In See also:Gothic See also:architecture there is no keystone, but the junction of pointed ribs at their See also:summit is sometimes decorated with a See also:boss to See also:mask the intersection.

End of Article: KEYSTONE

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