In museums, almost everyone has their own mobile device (e.g., smartphone or tablet) with them. In addition, many museums include interactive exhibits (e.g., multi-touch tables), but the visitors' own devices are rarely used as part of a device ecology. On the other hand, museums and libraries have a huge number of objects which cannot be shown in exhibitions. Data Visualization can help here to make these data visible and searchable. Currently, there are no suitable concepts to seamlessly link different surfaces in museums. Our approach is to integrate the visitor's own device in a multi-device ecology (MDE) in the museum to enhance the visit through interactive data visualization.