I order a steady supply of weird things from eBay. Last year that included a packet of 25 or so sepia-colored vintage prayer cards. They're small, about 3x4", and these date from the middle 1900's. I'm collaging (desecrating?) them with some anatomical cuttings and other scraps, for a little book project I have in mind. The cards are a centuries-old tradition in the Catholic Church. They typically show a religious image on the front with a verse or prayer on the reverse, and are used to commemorate special moments (First Communion, Confirmation, funerals, etc.). Many of them are quite beautiful.