The mystery of Janusz III's death: poison or illness of the last Piast of Masovia?

Janusz III, the last Masovian prince of the Piast dynasty, died in 1526 at just 23 years old. Despite his reputation for extraordinary physical strength, his sudden death sparked suspicions of poisoning — Queen Bona was even accused. Historians consider whether illness or an unhealthy lifestyle may have been the cause.