If a statue in the park of a person on a horse has both front legs in the air, the person died in battle. If the horse has one front leg in the air the person died as a result of wounds received in battle. If the horse has all four legs on the ground, the person died of natural causes.

This is not true either - the statue in Prague with St. Wenceslas has one front leg in the air. And St. Wenceslas was murdered by his brother.