The History of the Grand Duchy of Lithuania

The agulonians were famous in europe for being one of the most fertile dynasties anyone can remember seeing. And then it suddenly stops, and this is quite curious. It's very hard to draw family trees sor a huge enisty, famously fertile. The last king, sigismund augustus, the last yagulonian king of poland, last grand duke of ithuenia has no legitimate children when he dies aged 52. So they don't quite pull off that transition, and they they die out.