Keystone and Voussoir in Masonry Arches - Architectural Terminology Explained #153898 (License: Personal Use)

This technical illustration highlights two critical components of a masonry arch: the keystone, the central wedge-shaped stone at the apex that locks the arch in place, and the voussoirs, the surrounding wedge-shaped stones that distribute compressive forces. The diagram uses arrows and labels to clarify their roles in load-bearing architecture, especially in Romanesque and Gothic construction.

Used in educational content about architectural history, engineering fundamentals, or restoration guides; matches user intent to understand arch mechanics or identify structural elements in historic buildings.