Amicus curiae
The amicus curiae practice was found in Roman law. It played an important part in both English common law and the American legal system. Later, it was introduced in international law, in particular, concerning human rights. Today, it is used by the European Court of Human Rights. It is also used in the Inter-American Commission on Human Rights, the Inter-American Court of Human Rights, the Court of Justice of the European Union and the Special Tribunal for Lebanon.