A Walk to Chapel Saint Lazare - 3

Just to the left of our walk, there's a tiny track that runs steeply uphill. On one corner is an old mill, currently undergoing restoration - and opposite is this rusty gate. Peer through and what you see is in the photograph below. It looks like a very small mausoleum, don't you think? There is no sign, nothing to indicate who is buried here, if indeed anyone is. I'd think it too small for a chapel and if it's a mausoleum, why isn't it in the cemetery which is at the other end of the village? The third photograph shows this tiny building from a different angle. What do you think it is?

You'd perhaps like to see the old mill? We will, we will. But tomorrow you'll see a knight in shining armour - on a horse, bien sûr.