In my most recent book (published by Oxford University Press in 2000), I examine the relationship between aesthetic ideas, cultural institutions, and museum architecture in nineteenth century Germany. Although I still have an interest in these issues, I am now working on problems in European international history. I have just completed a manuscript with the working title “The Monopoly of Violence: War and the State in Twentieth-Century Europe.” My next project will trace the theory and practice of sovereignty in Europe from the late middle ages to the present.