Introduction: Collecting art.- Comparative Studies of Civilization - Comparative Studies of Art Collection.- Collectors' Rights "versus" Artists' Rights - Conservation and Collection Care.- Comparative approaches to the study of national museums.- Private Collections "versus" Public Collections.- Governance of museums.- Selling art - Is it permitted? And if yes, under what conditions?.- Cultural Economics.- Museums and Collectors and the Illicit Trade of Art/Cultural Objects.- Conclusions: The Ethics of Acquiring Art and Antiquities.