Thomas N. Bisson's research addresses the political, institutional, and intellectual history of medieval Europe, focusing in particular upon the French kingdom, Languedoc, and Catalonia. He is the author ofThe Medieval Crown of Aragon: A Short History (Clarendon, 1986), Cultures of Power: Lordship, Status, and Process in Twelfth-Century Europe (University of Pennsylvania Press, 1995), Tormented Voices: Power, Crisis, and Humanity in Rural Catalonia, 1140-1200 (Harvard University Press, 1998), and The Crisis of the Twelfth Century: Power, Lordship, and the Origins of European Government (Princeton University Press, 2010); his most recent publication is the edition and translation of Robert of Torigni's Chronography for the Oxford Medieval Texts series (Oxford University Press, 2020).