The only religious building to feature on a Discworld stamp (to date) has been the Temple of Small Gods in Ankh-Morpork, This was the AMPO $5 triangle issued in the Year of the Sneezing Panda. I have not seen an image of the sheet of these stamps, but it is a reasonable guess that they were printed in small sheets of 8 stamps, with ornamental silver marginal decoration. As usual for the high value stamps this stamp is only available in LBEs and limited to 490 stamps and just 10 of the closed doors sport

The Cemetery of Small Gods is a little way away from the Temple. It is where the casualties of the Glorious Revolution of the 25th May are buried. On the anniversary each year the survivors who were there visit the graves bearing sprigs of lilac blossom. The Lilac Patrician of the Year of the Happy Goose was made available on a special How They Rise Up cover illustrated with a drawing of the graves in the cemetery.