Princess Elizaveta Ostrogska (Ukrainian: Єлизавета (Галшка) Острозька - Yelyzaveta (Halshka) Ostroz'ka; Polish: Elżbieta (Halszka) Ostrogska, 1539–1582), nicknamed Black Princess, was a Ruthenian heiress, the only child of Prince Illia Ostrogski and Beata Kościelecka.
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Early life
She was born in the Ostrog castle on 19 June 1539, soon after her father, Illia Ostrogski, died. In the Lithuanian Metrica she is referred to by name, including as Elżbieta, Elizabeth, and Halszka. In accordance with her father's drafted will before his death, her legal guardians were to be the Polish king Sigismund II Augustus, Sigismund's wife Bona Sforza, and Illia's half-brother Konstanty Wasyl Ostrogski. On 12 May 1542, the commissioning of Illia's real estate was finished, with his wife Beata getting one-third of his holdings and Elizaveta getting two-thirds. Her two-thirds consisted of the castles in Polonne, Krasyliv, and Chudniv, the Góry estate, a house in Vilnius, and 1/5 of the income from Ostrog. The annual income, in total, of Elizaveta's holdings amounted to 436 kopa of money, which was a significant sum at the time. Her mother was to administer all of the child's holdings, except the Góry estate and the Vilnius house, which were to be managed to Konstanty.




