Although much work has been done on the analysis of point patterns in archaeology in recent years, less attention has been paid to those situations where the spatial patterns take the form of a patchwork of sub-areas or a mosaic. This article indicates how such mosaic pattern can be studied quantitatively and the kinds of things that can be learned from their analysis. Examples to illustrate this are taken from the distributions of wattle and daub structures at the site of Piana di Curinga, southern Italy. (See also <b>AATA</b> <i>21-189</i>) -- AATA