Case law is a widely studied field, posing a series of questions. The first issue relates to the nature of case law itself, as the term cannot be given a single meaning. There is no one definition of case law, but rather a plurality of meanings depending on the historical period and legal system in question. After an analysis of Roman iurisprudentia and Anglo-Saxon case law, this work considers the Spanish legal system, as an example of a Continental jurisdiction, and distinguishes between the case laws of the Supreme and Constitutional Courts, the European courts, and the Superior...