When you renovate a house, you expect to find little bits of its history, like an old photo lost behind the refrigerator. What you don't expect is two very large, nicely preserved horse skulls buried under the floors. That's exactly what Colm Moriarty's aunt found when she was having some work done on her house in the 1980s.
This sounds like the set up for a B-grade horror movie, but horse skulls have actually been found under buildings - dating from the Iron Age well into the 19th century - across Northern Europe, from the UK to the Baltic states. And they didn't wind up there by accident.