Алексей Михайлович
Tsarevich Dmitry Alexeyevich (; 22 August 1648 – 6 October 1649) was the first son and heir of Tsar Alexis of Russia and Maria Miloslavskaya, brother of Tsarevich Alexei Alexeyevich of Russia, Tsar Feodor III of Russia and Tsar Ivan V of Russia and half-brother of Tsar Peter the Great. He died before he had a chance to succeed to the throne. He is buried in the Cathedral of the Archangel.