Jonathan R. LyonJonathan R. Lyon is Professor of History at the University of Chicago, where he specializes in the history of the Holy Roman Empire. He has previously held fellowships from the Humboldt Foundation and the Austrian Science Fund. He is the author of Prncely Brothers and Sisters: The Sibling Bond in German Politics, 1100–1250 (2013), which won the 2017 John Nicholas Brown Prize from the Medieval Academy of America, and Noble Society: Five Lives from Twelfth-Century Germany (2017). Read More Read Less