brick wall

When used alone the brick wall is effectively a fess masoned of a particular colour. The fesse is a bold horizontal band across the centre of the shield, A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:fesse masoning being a pattern of offset rectangles like the mortar in the class brick wall construction known as stretcher bond. The wall and the masoning can be any colours, although a strong is best.