Isabella I Byname Isabella The Catholic. Spanish Isabel La Catolica,1451- 1504. Queen Of Castile (1474-1504) And Of Aragon (1479-1504), Ruling The Two Kingdoms Jointly From 1479 With Her Husband.Engraving By W. Greatbatch From The Original In The Royal Palace At Madrid. From The Book History Of The Reign Of Ferdinand And Isabella, The Catholic, Of Spain Volume I By William.H.Prescott, Published 1851.