This thesis deals with the idea of using a location based mobile system for promoting a geographically founded authorship as an alternative to more commonly used ways of conveying information. The case presented in the thesis is the challenge for the newly formed Kaj Munk Museum to promote the life and authorship of Danish priest and writer Kaj Munk. Here it is claimed that Kaj Munk’s authorship can be presented through the location based platform Geocaching, where users will be able to interact with his works in a unique way, which combines physical and virtual domains. The Geocaching system is entirely based on user participation which places it in line with other Web 2.0-applications leveraging the resources of the entire user group. However, as the Geocaching-system also facilitates certain ways of interacting and being social, the system can be understood as an example of Social Software, albeit with a physical component – the caches – that is unique to Geocaching. Creating designs in this system gives the museum a medium for reaching a large audience with simple means, but it also represents a unique shift in the museum field. Creating content in systems for user generated content poses a challenge to the museum with regards to how they establish themselves as experts and how they positively include user initiatives. The potential for the museum is to reach a larger audience and create exhibitions that are dynamic in the sense that they evolve through user feedback and user additions. Concentrating on the intention of promoting Kaj Munk and persuading visitors of the musemum to increase their interest in his authorship and the museum, the research field of Persuasive Design adds a perspective on the designers’ ability to actively create intentional designs through a variation of identified persuasive strategies. With this in mind, the Kaj Munk Museum can create persuasive experiences for their visitors that are targeted at presenting Kaj Munk and his works in a specific manner that will have the optimal chance of persuading the visitors. Leveraging the notion of Kairos, the whole design rests on the idea of presenting a work of literature in the very physical surroundings it was conceived thus creating a link between the museum visitor, the text and the physical location. The suggestion is made that it is possible to leverage the principle of social distribution in social networks to facilitate persuasion on a large scale thus enabling the Kaj Munk Museum to use Geocaching as a low-cost, efficient channel to influence users in the entire social network. This thesis is constructive in the manner that it aims at producing an overall suggestion for a design of museum caches in the Geocaching-system. In the last chapter the suggestions are presented and related to the theoretical framework of Persuasive Design and Social Software. The result is a series of museum designs designed to promote Kaj Munk’s life and authorship, created in an environment that invites the visitors to participate in continually evolving the designs.