The death of Ivan IV, known as Ivan the Terrible, remains shrouded in mystery. He was the first Tsar of Russia, notorious for his brutal and autocratic rule. On March 18, 1584, he died suddenly while playing chess at the age of 53. There are various theories surrounding the cause of his death. The traditional view suggests he died of natural causes, while some scholars propose he was poisoned. A chemical analysis conducted in 1963 on Ivan IV's tomb revealed a significant presence of mercury in his remains, raising the possibility of poisoning.
On November 15, 1581, Ivan IV suspected his son, Ivan, of plotting to usurp the throne, leading to a violent confrontation that resulted in the prince's death. Similarly, the circumstances of Ivan IV's own death are contentious, with some believing he was murdered during a court coup. These events highlight the complexity and brutality of Ivan IV's reign.