Maria Borisovna of

Tver Tver ( rus, Тверь, p=tvʲerʲ) is a city and the administrative centre of Tver Oblast, Russia. It is northwest of Moscow. Population: Tver was formerly the capital of a powerful medieval state and a model provincial town in the Russian ...

(''Мария Борисовна'' in

Russian Russian(s) refers to anything related to Russia, including: *Russians (, ''russkiye''), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries *Rossiyane (), Russian language term for all citizens and peo ...

) (1442 – 1467) was Grand Princess consort of Muscovy, married in 1452, to

Grand Prince Grand prince or great prince (feminine: grand princess or great princess) ( la, magnus princeps; Greek: ''megas archon''; russian: великий князь, velikiy knyaz) is a title of nobility ranked in honour below emperor, equal of king ...

Ivan III Ivan III Vasilyevich (russian: Иван III Васильевич; 22 January 1440 – 27 October 1505), also known as Ivan the Great, was a Grand Prince of Moscow and Grand Prince of all Rus'. Ivan served as the co-ruler and regent for his bl ...

''Reinventing the Russian Monarchy in the 1550s: Ivan the Terrible, the Dynasty, and the Church'', Sergei Bogatyrev, The Slavonic and East European Review, Vol. 85, No. 2 (Apr., 2007), 278 note 29. and daughter of Boris Alexandrovich of

.''Appanage and Muscovite Russia'', Nikolay Andreyev, Companion to Russian Studies: Volume 1: An Introduction to Russian History, ed. Robert Auty, Dimitri Obolensky, (Cambridge University Press, 1991), 90. When

Vasili II Vasily Vasiliyevich (russian: Василий Васильевич; 10 March 141527 March 1462), also known as Vasily II the Blind (Василий II Тёмный), was the Grand Prince of Moscow whose long reign (1425–1462) was plagued by the ...

(Ivan III's father) was getting ready to attack

Dmitry Shemyaka Dmitriy Yurievich Shemyaka (Дмитрий Юрьевич Шемяка in Russian) (died 1453) was the second son of Yury of Zvenigorod by Anastasia of Smolensk and grandson of Dmitri Donskoi. His hereditary patrimony was the rich Northern to ...

, he found an ally in the person of Boris of Tver. The two decided to seal the alliance by arranging a

betrothal An engagement or betrothal is the period of time between the declaration of acceptance of a marriage proposal and the marriage itself (which is typically but not always commenced with a wedding). During this period, a couple is said to be ''fi ...

between the future Ivan III and Maria of Tver in 1452. It appears that she died from

poison Poison is a chemical substance that has a detrimental effect to life. The term is used in a wide range of scientific fields and industries, where it is often specifically defined. It may also be applied colloquially or figuratively, with a broa ...

ing in 1467. However, if one is to believe

Joseph Volotsky Joseph Volotsky — also known as Joseph of Volotsk or Joseph of Volokolamsk (russian: Ио́сиф Во́лоцкий); secular name Ivan Sanin (russian: Ива́н Са́нин) (1439 or 1440 – September 9, 1515) — was a prominent Russian ...

, she had been suffering from "infirmity" since childhood. She gave birth to

Ivan the Young Ivan Ivanovich (also known as, Ivan the Young, Ioann Ioannovich and Ivan Molodoy) (''Иван Иванович'', ''Иоанн Иоаннович'', ''Иван Молодой'' in Russian) (15 February 1458 – 6 March 1490), was the eldest son an ...

in 1458.

References

, - , - , - 1440s births 1467 deaths Russian royal consorts 15th-century Russian people 15th-century Russian women {{Russia-bio-stub