Mstislav I Vladimirovich Monomakh (Old East Slavic: Мьстиславъ Володимѣровичъ Мономахъ, romanized: Mĭstislavŭ Volodiměrovičŭ Monomakhŭ;[a] Christian name: Fedor;[1][2] February 1076 – 14 April 1132), also known as Mstislav the Great, was Grand Prince of Kiev from 1125 until his death in 1132.

[3] He is figured prominently in the Norse Sagas under the name Harald, to allude to his grandfather, Harold II of England.

[5] Mstislav's life was spent in constant warfare with the Cumans (1093; 1107; 1111; 1129), Estonians (1111; 1113; 1116; 1130), Lithuanians (1131), and the princedom of Polotsk (1127; 1129).

Mstislav was the last ruler of a unified state, and upon his death, as the chronicler put it, "the land of Rus was torn apart".

Later that year Mstislav married again, to Liubava Dmitrievna Zavidich, the daughter of Dmitry Saviditsch, a nobleman of Novgorod.