Grand Prince of Moscow
Demetrios was born in 1350 and succeeded as Prince of Moscow as a child, later holding also the grand-princely dignity of Vladimir. Having lost his father young, he was raised under the care of Saint Alexis, Metropolitan of Moscow. The synaxarion recalls that he united Christian piety with notable gifts as a statesman, laboring both for the gathering of the Russian principalities and for their freedom from Tatar-Mongol rule.
During his reign Moscow grew in strength and standing. He raised the first stone walls of the Moscow Kremlin and founded monasteries, and his rule is remembered as a turning point in the consolidation of the Russian state around Moscow.