What are architectural masonry details called that are created by projecting brick at corners?

The architectural masonry details created by projecting brick at corners are known as quoined corners. Quoins are the stones or bricks used to accentuate the corners of a structure, providing both aesthetic appeal and structural stability. This technique not only gives the corners a distinctive look but also helps in reinforcing the overall integrity of the masonry wall. Quoins can be made from various materials, including stone or brick, and they often feature a different color or texture to enhance their visibility and decorative effect.

In masonry design, the use of quoins has a long history and is often associated with classical architecture, where the emphasis on symmetry and proportion is paramount. This feature adds visual interest, breaks the monotony of flat wall surfaces, and provides a transition from one wall plane to another, making it an important aspect of architectural detailing.