This is the severed head of John the Baptist, I mean what a lovely thing to pop in your living room. This was a popular image in the medieval period and it’s made of terracotta, dating from around 1380 to 1420.
It was probably once in a church at the top of an arch, but it ended up embedded in a cottage wall in the village of Barney, near to Thursford and was found in 1958 when the wall was demolished. I suppose that it’s quite inspirational in its own way.
Thanks to Norfolk Heritage Explorer (which is a really wonderful website) the exact location where it was found is marked accurately on the map (the little yellow triangle in the middle of the image), although they only got confirmation of the location in 1984 because a local man remembered where it was found.