Illustrated Architecture Dictionary
Diaper pattern (Diaper work)
Surface decoration with a repeating geometric or floral pattern
Diaper work can take the form of lozenges (diamond shape), squares, stylized foliage, or scalesFound in almost all styles of architecture
Tudor brickwork: Diaper (mostly diamond patterned) decoration of variable form and completeness, enlivens many of the principal elevations. The patterns are formed of relatively dark, over-fired bricks set within a background of bricks ranging in color from orange and red to purple and brown.
In Victorian England, attempts were made to reproduce diaper in brickwork, bricks of different colors being used to form bold patterns like pieces of polychrome cross-stitch work.
Examples from Buffalo architecture: