Treaties of Münster and Osnabrück (1648) end the Thirty and Eighty Years' Wars, institutionalizing territorial sovereignty as binding law between powers for the first time, though the doctrine itself predates Westphalia (Salamanca, Bodin).
InstitutionCongress of Münster and Osnabrück
Historical regionWestphalia, Holy Roman Empire
Primary sourceTreaties of Münster and Osnabrück (Oct 24, 1648)
Secondary sourceOxford Public International Law; Encyclopaedia Britannica