International law, also known as "public international law" is the system of law that imposes rights and obligations on States in their dealings with each other. Article 38 (1) of the Statute of the International Court of Justice lists the formal sources of international law as:
a. International treaties and conventions
b. Customary international law
c. General principles of law
d. Judicial decisions and teachings of the most highly qualified publicists as a means of identification of the law.
The Peace Palace is often called the seat of international law because it houses the International Court of Justice (which is the principal judicial body of the United Nations), the Permanent Court of Arbitration, the Hague Academy of International Law and the extensive Peace Palace Library.
Peace Palace in The Hague (Netherlands)