The aim of MORITZ (Mobile Tours in European Textile-Industry Centers) is to develop a concept for tours using mobile devices at industrial heritage sites and museums in Europe. To extend each museumís exhibitions into the various industrial sites and their environments, weíre developing PDA applications which allow visitors to explore each historical site more thoroughly, interact with monuments of industrial heritage and receive multimedia content directly at the site. The innovation lies in the development of both conceptual and technical approaches that are transferable to different sites within the existing European network of textile industry sites along the European Route of Industrial Heritage (ERIH). An outdoor mobile tour has to weigh the relation between the points of information and the time needed to walk the tour. To be of maximum benefit to the visitor, the information has to be concentrated and bundled. Multiple aspects have to be addressed, focused under a theme of the tour, and related to other places and times. The visitors and each of the museumís media attain mobility and allow for immediate and intuitive encounter with locations of industrial culture. By crossing barriers of space and time, the mobile medium delivers insights into the past of industrial sites -- using historical views of the settings, images of people who have worked in these settings, and explanations and reports referring to contemporary witnesses to characterize commonality with other places.