The Secretary of State of the Holy See, also known as the Cardinal Secretary of State, the Secretary of State of His Holiness or the Vatican Secretary of State, presides over the Secretariat of State of the Holy See, the oldest and most important dicastery of the Roman Curia. The Secretariat of State performs all the political and diplomatic functions of the Holy See and Vatican City. The Cardinal Secretary of State is considered the head of government of the Holy See, equivalent to a prime minister.
- Country
- Vatican City
- Inception
- November 20, 1551
