The beautiful Mother Anonymous once served a parish whose church building had a dinosaur in its stained glass windows. The members were quite proud of it, and rightly so. How many church windows can there be that are devoted to the evolution of life?
Still, the Cathedral of St. Ambrose, in a town near Milan called Vigevano, goes the wife's old church one better. It has an actual dinosaur skull built right into it.
This wasn't done on purpose. The cathedral was built in the 16th and 17th centuries, using marble from a quarry now noted for its abundance of fossils. But it was only recently that a paleontologist, Andrea Tintori, identified the skull, which is embedded in a section of the altar rail. Story and pics here.
This is a neat discovery, made a bit more amusing by the hue and cry of Anglicans the world over, claiming that they have dinosaurs too, you know.