Thought this was fascinating in a nerdy sort of way.  You know the way the border runs right through Pettigoe and Clones and I'm sure a few other places.   Well this is the border of Belgium and Netherlands and as you can see it's not exactly easy to manage.  Interesting.  Irish dioceses have some features like this, with bits of Ossory surrounded by Killaloe, chunks of Tuam in Clonfert, Achonry and Galway.  Cashel and Emly has a bit of Waterford and Lismore in it while Ardagh and Clonmacnoise has three separate bits.  Worth investigating further some time.  Perhaps.  When all the painting is finished.