Following King Sigismund III's Prussian regency contract (1605) with Joachim Frederick of Brandenburg and his Prussian enfeoffment contract (Treaty of Warsaw, 1611) with John Sigismund of Brandenburg these two rulers of Ducal Prussia guaranteed free practice of Catholic religion in prevailingly Lutheran Prussia.
Warsaw | Treaty of Versailles | University of Warsaw | Warsaw Pact | Warsaw Uprising | Warsaw Ghetto | Warsaw University of Technology | Legia Warsaw | Treaty of Trianon | Duchy of Warsaw | Treaty of Utrecht | Warsaw Metro | Treaty of Aix-la-Chapelle | Warsaw, Missouri | Treaty of Berlin (1878) | Warsaw School of Economics | Treaty of Rome | Treaty of Lisbon | Treaty of Campo Formio | Treaty of Berlin | Treaty of Aix-la-Chapelle (1748) | Maastricht Treaty | Treaty of the Pyrenees | Treaty of Saint-Germain-en-Laye (1919) | Treaty of Guadalupe Hidalgo | Planned destruction of Warsaw | Penn Treaty Park | Lateran Treaty | Washington Naval Treaty | Warsaw, Virginia |