Maria Vasilkovna of Polotsk explained

Maria Vasilkovna of Polotsk
Reign-Type:Tenure
Issue:
    Father:Vasylko Svyatoslavych
    Death Date:1194
    Spouse:Sviatoslav III of Kiev

    Maria Vasilkovna of Polotsk (Ukrainian: Марія Васильківна) (?-1194), was a Grand Princess of the Kiev by marriage to Sviatoslav III of Kiev, Grand Prince of Kiev (r. 1174, 1177–1180, 1182–1194).[1]

    She had great influence and participated in politics as advisor to her spouse. In 1180, she advised her spouse to form an alliance with the Olgovychi, and participated in the meeting where Davyd Rostislavich was excluded. On her advice, her spouse also forged an alliance with Rostyslavychs, which secured stability in the territory during the reign of her spouse.

    References

    1. Войтович Л. В. Ізяславичі полоцькі // Князівські династії Східної Європи (кінець IX — початок XVI ст.): склад, суспільна і політична роль. Історико-генеалогічне дослідження. — Львів: Інститут українознавства ім. І.Крип'якевича, 2000. — 649 с. — ISBN 966-02-1683-1.