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
Foreign relations of the Holy See between countries, including a dispute between Germany and Spain over the Caroline Islands. The Lateran Treaty of 1929 and the founding of the Vatican City State was not followed by any great immediate increase in the number of states with which the Holy See had official relations. This came later, especially after the Second World War. The Holy See, as a non-state sovereign entity and full subject of international law, started establishing diplomatic relations with sovereign states in the 15th century. It had the territory of the States of the Church under its direct sovereign rule since centuries before that