He died on May 5, 1821, at the age of 51. In 1840, his remains were transported to Paris, where he was buried in the Church of the Invalides. For a long time, the common belief was that Napoleon was poisoned with arsenic. However, research conducted by an international team in 2007 ruled out this diagnosis. It was found that Napoleon suffered from advanced stomach cancer (Napoleon's father also died of stomach cancer). A retired doctor from Denmark has a different idea on the subject, claiming that the emperor already had problems with his urinary tract from the age of three, and it was this condition that contributed to his premature death.