Robert Nisbet Bain, 1911 Encyclopædia Britannica, Volume 7… (1911)
“ DEMETRIUS DONSKOI [1] (1350–1389) , grand duke of Vladimir and Moscow, son of the grand duke Ivan Ivanovich by his second consort Aleksandra, was placed on the grand-ducal throne of Vladimir by the Tatar khan in 1362, and married the princess Eudoxia of Nizhniy Novgorod in 1364. It was now that Moscow was first fortified by a strong wall, or kreml (citadel) , and the grand duke began “to bring all the other princes under his will.” ”
