Based on an extensive and very meticulous study of different archives and the evaluation of original, previously unpublished, archival material, this book highlights the key aspects and trends of the European and American art markets in the late nineteenth and early twentieth centuries. In particular, the book focuses on how these markets influenced each other from the viewpoint of one of the most prominent museum directors of this period, Wilhelm von Bode (1845–1929). Given the complexity of the topic, the book is structured into two parts. The first part focuses on Bode’s interactions with the German banker and dedicated art collector based in Paris, Rudolphe Kann (1845–1905). The second part follows the sale of the Kann Collection to the dealer Joseph Duveen and follows on the relationship between Bode, Duveen and the American collectors. The book will be of interest to scholars working in art history, museum studies, and the art market.