Isabella I became queen of Castile in 1474 and ruled jointly with her husband Ferdinand of Aragon. Their reign defeated a rival succession claim, conquered Granada and strengthened royal authority. Isabella sponsored Columbus’s voyage across the Atlantic and supported religious uniformity through the Inquisition and the expulsion of Jews who refused conversion.
Her policies helped create a powerful dynastic monarchy while inflicting persecution and opening the way to colonial conquest. Isabella I of Castile was born in Monasterio de Nuestra Señora de Gracia and died in Palacio Testamentario.
Jean Plaidy’s Castile for Isabella follows the young princess through confinement, dynastic pressure and the political manoeuvring that eventually brings her to the Castilian throne. Robyn Young’s Court of Wolves meets Isabella later, as she and Ferdinand complete the conquest of Granada while Christopher Columbus presses for support for a western voyage. C. W. Gortner’s The Last Queen makes Isabella the formidable mother whose death turns Juana’s marriage into a struggle over the inheritance of Castile. Sarah Gristwood’s Game of Queens treats Isabella as an early model in the networks of female rulership and dynastic mentorship that shaped sixteenth-century Europe. Elizabeth Drayson’s The Moor’s Last Stand places her on the other side of Muhammad XII’s story, as the Catholic Monarchs exploit Granada’s internal divisions and receive the final Nasrid surrender.