The international workshop "Philosophy Transcendentalism, Phenomenology and Natural Law"took place on May 19 and 20. The event was organized by the project of research 'Natural Law and Rationality internship' of the Institute for Culture and Society (ICS). The ICS is the research center in Humanities and social sciences of the University of Navarra.

Jens Timmermann, from the University of St Andrews, was the first to present with his presentation "Kant on Practical Irrationality". Prof. Timmermann is an expert in ethical theory and Philosophy ancient. Marta Albert, professor of Philosophy of Law at the Universidad Rey Juan Carlos, presented her lecture "Ética material de los valores y Derecho natural".

On the second day, May 20, Mariano Crespo, researcher of the ICS, participated with his discussion paper 'Theory of Law a priori and Natural Law' and Roberto Walton, from the University of Buenos Aires, with 'Transcendental Monadology and Natural Law'. Alejandro Vigo, researcher main project 'Natural law and rationality internship', closed the workshop with a brief speech summarizing the ideas of the papers as well as the debates they gave rise to.

The project aims to delve historically and systematically into the different theories about natural law and rationality internship, in order to contribute to identifying and analyzing the methodological and normative challenges posed by other projects at research.