. "Quoins (/k\u0254\u026An/ or /kw\u0254\u026An/) are masonry blocks at the corner of a wall. They exist in some cases to provide actual strength for a wall made with inferior stone or rubble and in other cases to make a feature of a corner, creating an impression of permanence and strength, and reinforcing the onlooker\u2019s sense of a structure\u2019s presence.Stone quoins are used on stone or brick buildings."@en . .