Apuntes para una edición crítica del Lucidario del rey Sancho IV de Castilla

The aim of the paper is to describe the textual tradition of the Lucidario ascribed to Sancho IV king of Castile (1285-1294), son of Alfonso X. The encyclopedic treatise, which consists in a series of answers of a master to his disciple about many theological and natural subjects, is preserved in six castilian manuscripts and in one manuscript of a latin translation made in the seventeenth century; everyone of them offers a different version of the text, either for the total amount of the chapters or for their internal sequence, posing therefore the problem of their reciprocal relations. Through an external and internal inspection of the manuscripts, and particularly by means of various errors and variants shared by them, it's possible to define a stemma codicum with two families. While in most cases both of them show the same text, ther are some chapters in which one family diverges from the other because of the presence of different sections, as result of an intervention on the original text. A new critical edition will make us of all the manuscripts to reconstruct the shared part of the text, pointing out at the same time the sections belonging only to one or the other family, showing the textual stratification throughout the work's history.