Caption:
Isabella Jagiellon (1519-1559). Queen consort of Hungary (1539-1540) by her marriage to John I of Hungary (John Zápolya). Regent of the Principality of Transylvania (1540-1550 and 1556-1559). Portrait. Engraving. "Los Heroes y las Grandezas de la Tierra" (The Heroes and the Grandeurs of the Earth). Volume VI. 1856.