I was traveling in the Dordogne region of France this summer. The churches in Sarlat and the village of Saint-Julien-de-Lampon had large logs with brass tacks banged into them. They were clearly an offering, with a sign in the Saint Julien church indicating monies would go toward the upkeep of the church.
You can see the log in Sarlat in this picture from a blog I found in the lower right corner:
I’m wondering if anyone knows what the symbolism or the story behind the log and tacks are. The Crucifixion would seem to be obvious, but just doesn’t feel right to me and I suspect there’s another story.