Orders, decorations, and medals of the Holy See of the Catholic Church by his authority as head of the Holy See and sovereign of the Vatican City State. Historically, membership in these orders was either conferred by Papal bulls not signed by the Pope or by apostolic letters signed by the Pope himself. Since the reforms of these orders in the beginning of the 20th century, the diplomas have been signed by the Cardinal Secretary of State. In general, "Papal orders of knighthood" refers to the five equestrian orders of the Holy See awarded directly by the Supreme Pontiff as head of the Catholic Church, Holy See and
Legal status of the Holy See personality akin to that of states, has led professor Ian Brownlie to define it as a ""sui generis" entity". Moreover, the Holy See itself, while claiming international legal personality, does not claim to be a State. Cardinal Jean-Louis Tauran, former Secretary for Relations with States of the Secretariat of State of the Holy See, has underlined that we must avoid the temptation of assimilating the Holy See and its international action with that of a State, with their thirst for power. For him, the Holy See is unquestionably a sovereign subject of international law but of a predominantly religious nature.