The 100th anniversary of this foundation provides the Bibliotheca Hertziana, Max Planck Institute for Art History, with the opportunity to fundamentally reassess its own history and that of the historical buildings that today house the research institute. Art historians and historians approach the history of the Bibliotheca Hertziana in various ways. Their analysis, which takes into account the historical context, offers readers a fascinating insight into the panorama of societal upheavals over the last 100 years, reflected in the life stories of one of the world's most significant research institutions dedicated to Italian art history and its protagonists. Through its historically evolved ensemble of buildings, the Bibliotheca Hertziana has become closely intertwined with the genius loci of the art metropolis of Rome. The exploration of these structures - from the residential palace of the painter prince.