Leonor López de Córdoba (1362/1363–1430) was a noblewoman who produced the first known female autobiographical text in Castilian, today known as her Memorias (“Memoirs”). She lived in troubled times, marked by civil war and the plague. Her father was Martín López de Córdoba, a key figure at the court of King Pedro I of Castile. The defeat and murder of this monarch in 1369 by Enrique of Trastámara meant that her immediate family fell in disgrace. The Memorias are a brief text telling of the execution of her father (1371), her lengthy imprisonment (1371–1379), and her unsuccessful initial attempts to rebuild her fortune after her release, which provide illustrations of the autonomy of Castilian noblewomen in the late Middle Ages. The time span covered ends before she became an advisor to Queen Catherine of Lancaster, gaining an immense though short-lived influence at her court. The Memorias are also of interest because of the significance given to Marian devotion.