Global hub art market. About the right and important channels for purchasing art. Art between investment and speculation: Dirk Boll, Christie’s, in conversation with Birgit Maria Sturm, BVDG. br Host: Kathrin Luz.br (in German language).br br Part of the talk series “Forever Art Indestructible. What makes art so valuable – and so indestructible?“.br br Cologne (Germany), November 19, 2023.