In the work called Uglimited Unwritten Constitutional Principies (El poder del bloque de constitucionalidad sin limite, in Spanish), the juridical problem that was posed consisted of determining whether International Human Rights Treaties that are a part of unwitten constitutional principies sensu stricto modify the text of the 1991 Constitution of Colombia. To this end, we proceeded to identify the precedents of unwritten constitutional principies in France and Spain, which are the countries that pioneered the application of this interpretation and legal normative integration model. After that. we indicate the differences with the model of unwritten