Dictionary.net

Ill Spanish law. The name of a code of laws, more fully described as "Las Sicte Partidas" ("the seven parts," from the number of its divisions,) which was compiled under the direction of Alphonso X., about the year 1200. Its sources were the customary law of all the provinces, the canon law as there administered, and (chieily) the Roman law. This work has always been regarded as of the highest authority in Spain and in those countries and states which have derived their jurisprudence from Spain.