A successful field research is the prerequisite for all following work stages. In the first phase, we register the various buildings in their entirety by means of sketches and drawings that are the basis for further measurements. Geographical and topographical particularities, such as landscape, village structures and orientation of the buildings are an essential part of the survey. In a second step, we gauge the building digitally using a laser tachymeter what secures an extremely high accuracy of measurements, particularly in extreme topographies and in spacious areas. Measuring by hand completes this phase, especially in case of internal spaces that are difficult to access and for building details. The third phase includes determining the interior in order to support the interdisciplinary cooperation. Thus, we are able to locate the various particularities, such as inscriptions, sculptures, wall paintings, painted ceilings and wooden carvings within the building context. A considerable number of photographs complete every phase of the fieldwork and facilitate the elaborating of plans.