There is a Hanky quilt pattern that uses overlaying hankies to create a sort of crazy quilt. If you want them intact....put them onto a backing square...if not afraid or you opt to cut them....you could use them on a crazy quilt. A lot of the older doilies were done with the fine crochet thread as opposed to the heavier threads and would be nice on a crazy quilt or for a medallion with or without outlying satellites of smaller ones. A little more labor but you could back the doilies and then shape them into a floral bouquet that fills a vase with a doily enhanced motif...The possibilities are truly endless and up to you.