Tsarevich Dmitry Alexeyevich of Russia

Tsarevich Dmitry Alexeyevich (Дмитрий Алексеевич; 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 in infancy at the age of nine months, some 26 years before the death of his father. He is buried in the Cathedral of the Archangel.