Usually the application of digital media in authentic museum environments involves the use of equipment that could easily disturb the carefully preserved atmosphere of the place. In this demo we would like to present the project »Digitales Osmatinum« (Digital Osmantinum), a museum system that makes use of a PDA based guide system in order to introduce the life and work of the German poet Christoph Martin Wieland. While the use of PDA based guide systems is quite common for ambitious museum applications, our project takes the approach of an overall system design. Therefore it combines different technologies with the requirements of the project stakeholders in order to mediate an experience for the visitor. At the authentic place, technology is integrated in such a way, that it not only visually merges with the environment but also tries to minimize user interactions. WLAN positioning is used where content should be presented without explicit user interaction but in accordance to the location of the visitor. Active selection on screen and RFID technology are of use, whenever the user requires in-depth content. The main challenge of the project had been to develop an interface for the guide system that makes the access to the content in different contexts an enjoyable experience for the user. The museum system itself is defined as a work in progress that will never be finished. A content structure had been developed that makes it possible to continuously extend and maintain the museum system.