Under the guidance of Gustav Adolph, Cardinal Richelieu, and Jules Mazarin, a peace was finally negotiated. The congresses of Münster and Osnabrück, the first of their kind, led to the signing of the Treaties of Westphalia, the first multilateral diplomatic gathering in Europe to end a regional war and build a new order. Among those present were “145 delegates representing 55 jurisdictions, including the Holy Roman Empire and all the major kingdoms except Great Britain, as well as significant duchies, margraves, landgraves, bishoprics, free cities, and imperial cities. The correct answer is A.