It All Began with Linen Table Napkins

 The walnut brown frames fabric was a set of (real) linen table napkins from Goodwill or a thrift store. (It's been awhile since acquiring them) The fabric insets on the front are cut from the same fabric as the backing fabric.

While these photos leave something to be desired it the way of clarity etc., I believe you can get an idea of the possibilities for using fabrics like these to get different effects on Cathedral Windows quilts.