Alfonso X (1252-1284) was one of the outstanding royal patrons of the 13th century. The work done at his court included translations from the Arabic of treatises on astronomy, astrology, and magic and works of cooperative scholarship which appear to have been part of a scheme to provide standard reference works. Procter's five essays give an overview of Alfonso's role as a patron of learning.

This book analyses text, image and manuscript layout to deepen our understanding of the different ways in which Alfonso is presented as a learned king in the manuscripts he commissioned, and reassesses the number of manuscripts copied for him.

Recent publications about King Alfonso X have tended to focus on his role as monarch in the context of the institutions of the realm. This book, however, emphasizes the human dimension of this extraordinary figure. Drawing on King Alfonso’s own works and on extensive archival sources, both well-known and neglected, Salvador Martínez brings to life a king who valued the possession of knowledge above all earthly riches. The "Learned King" left a vast legacy of work, which would influence developments in both Spain and Europe, most significantly in the transfer of knowledge from the Arabs to the Christian West. With his intellectual curiosity and his pursuit of wisdom, Alfonso X is a towering figure at the origins of modernity.