The historian Mariana, writing at the end of the sixteenth century, summed up the achievements of Alfonso X in the epigrammatic phrase Dumque cœlum considerat, observatque astra, terram amisit, and this conception of the king as a scholar incompetent to govern is, on the whole, still very generally accepted. More than a century later, the Marquis of Mondéjar, in his Memorias Históricas del Rey Don Alonso el Sabio, posthumously published in 1777, attempted a vindication of the king. His work is a narrative of the political history of the reign, based on the Crónica de Alfonso Décimo, a late and unreliable source, but the only narrative account of the reign that is of any length. Mondéjar was at pains to point out the contradictions and errors of the Crónica, and, wherever possible, to clear the king's reputation from its imputations. Since the beginning of the nineteenth century interest in Alfonso X has steadily increased. The publication of the text of his legal codes, and of collections of documents containing materials for this period, and the gathering together of records in the Archivo Histórico Nacional at Madrid have much facilitated the task of investigation. Some good work has recently been done on certain aspects of the subject. German and Spanish scholars have studied Alfonso's relations with Germany and Italy, arising out of his candidature for the Imperial crown; his relations with France have been elucidated, and much critical work has been carried out on his literary achievements. The publication of historical material, the specialized research of recent years, above all the advance in historical method and criticism, and the change in the fashion of historical writing which have taken place since Mondéjar's time have combined to make his work antiquated.
