Encyclopædia Britannica, Ninth Edition/Tver (2.)
Tver dates its origin from 1180, when a fort was erected at the mouth of the Tvertsa to protect the Suzdal principality against Novgorod. In the 13th century it became the capital of an in dependent principality, and remained so until the end of the loth century. Mikhail Yaroslavovitch, prince of Tver, was killed fighting against the Tatars, as also was Alexander Mikhailovitch, who boldly fought for the independence of Tver against Moscow. It long remained an open question whether Moscow or Tver would ultimately gain the supremacy in Great Russia, and it was only with the help of the Tatars that the princes of the former eventually succeeded in breaking down the independence of Tver. In 1486, when the city was almost entirely burned down by the Muscovites, the son of Ivan III. became prince of Tver; the final annexation to Moscow followed four years later. In 1570 Tver had to endure, for some reason now difficult to understand, the vengeance of Ivan the Terrible, who ordered the massacre of 90,000 inhabitants of the principality. In 1609-12 it was plundered both by the followers of the second false Demetrius and by the Poles.