diaper

Surface decoration composed of repeated, small, geometrical motifs, such as diamonds or squares, connecting with one another. Diaper patterns are used in a variety of mediums, such as stained glass, textiles, and illuminated manuscripts, and are also used to decorate stone or brick surfaces in architecture.

Diaper pattern on brickwork, Fulham Palace, London. Tudor period. Ca. 1495.  Photo: David Hawgood.