studied Art History, German and English Language and Literature at the Universities of Cologne and Florence. Ph.D. at the University of Cologne with a thesis on the history of the art market in Renaissance Florence (2001). Since April 2011 leader of the Minerva Research Group Roma Communis Patria. The National Churches in Rome from the Middle Ages to the Modern Era at the Bibliotheca Hertziana. Areas of expertise: economic and social history of the Renaissance; history of the art market in Italy; art patronage of the Medici; cultural exchange between Spain and Italy in the 16th century; the national churches in Rome and questions of cultural identity.