Nowadays as in the past, treaties play a fundamental role in international relations. The present website aims at offering to an interested public an introduction to international treaty law, i.e. the law of the treaties concluded between States in written form and governed by public international law.
In proceeding by deduction, the author's intention is to present international treaty law by starting from its inherent principles as embodied in the Vienna Convention on the Law of Treaties of 1969. This convention has entered into force on 27 January 1980 and has been ratified by more than 90 countries.
