[Emperor Nikolas I of Russia: the definitive diagnosis].

The authors analysed the unpublished medical documentation from the depositories of the Russian State Historical Archive (RSHA) containing materials that shed light on the circumstances around the death of Emperor Nikolas I of Russia. They put forward arguments in support of the proposition that the Emperor died from post-influenza pneumonia and dismiss the popular view that he was poisoned. The previously unpublished protocols of Nikolas' body postmortem examination and embalming are presented.