The 350th anniversary of the Peace of Westphalia in 1998 was markedby a flurry of conferences and publications by historians, but it waslargely ignored in the discipline of international relations (IR). Thisoversight is odd because in IR the end of the Thirty Years War isregarded as the beginning of the international system with which thediscipline has traditionally dealt. Indeed, the international system hasbeen named for the 1648 peace. For some time now, this Westphaliansystem, along with the concept of sovereignty at its core, has been asubject of debate: Are the pillars of the Westphalian templedecaying ? Are we moving beyond Westphalia ?