Nowadays, Constitutional Courts carry out an essential function in every Democratic State because they safeguard the constitutional provisions and guarantee that the rest of the legal order complies with them. Te Spanish Constitutional Court is not an exception and, through its interpretative function, has been able to specify and develop the content of provisions both at constitutional and sub-constitutional levels, creating norms, rules, and principles that adhere to those of constitutional rank. Te present work aims to give the reader an overview of the organization and functioning of the Spanish system of constitutional justice, making a particular emphasis on the Constitutional Court?s interpretative function because this is the main and most important function of current Constitutional Courts.

Nowadays, Constitutional Courts carry out an essential function in every Democratic State because they safeguard the constitutional provisions and guarantee that the rest of the legal order complies with them. Te Spanish Constitutional Court is not an exception and, through its interpretative function, has been able to specify and develop the content of provisions both at constitutional and sub-constitutional levels, creating norms, rules, and principles that adhere to those of constitutional rank. Te present work aims to give the reader an overview of the organization and functioning of the Spanish system of constitutional justice, making a particular emphasis on the Constitutional Court?s interpretative function because this is the main and most important function of current Constitutional Courts.