The Anales castellanos segundos are a set of Latin annals compiled in the mid or late twelfth century in Castile, covering the period from the nativity of Jesus to the death of Queen Urraca in 1126 (in the edition of Flórez) or to 1110 (in the edition of Gómez-Moreno). It is preserved in a thirteenth-century manuscript now known as Vossiani Latin O.91 and kept in the Universiteitsbibliotheek at Leiden. This manuscript was kept at the University of Alcalá de Henares (ancient Complutum) until at least the sixteenth century and thus the annals were known as the Annales Complutenses.