تعريف ومعنى "capstone"

What is a "capstone"?

In architecture, a capstone is the top stone or block that completes the structure of a wall, arch, or column. It is often placed at the highest point and serves both a functional and decorative purpose, providing stability and finishing the design. Capstones can vary in shape and size, and they are commonly made from materials like stone or concrete. By adding a decorative touch, capstones enhance the overall appearance of the structure while ensuring that the construction is secure and visually appealing.