Anyone ever heard of Szron?

There's a horse I've started riding who's been imported from Poland, he's by a stallion called Szron and his name is Wiersz. He's apparently a sports horse of some kind (no idea what but he really can jump!). My trainer was showing him to some prospective buyers and I heard him mention that Szron was some sort of champion somewhere. Now I'm just curious as to who he is!