Landscapes are in perpetual transformation; change is one of their elementary phenomena. 1 This is due to several factors, some of them basing on natural causes like climatic changes or changes of soil quality, for example by salinization or lowering of the water table. Human beings provoke other changes, including deforestation, draining of swamps, or river regulation. 2 Extremely important are the establishment of settlements and the construction of roads and routes for developing a regional or even national communication system. 3 These are common efforts to transform a natural space into a cultural landscape; 4 but as a result, one has to notice that the former unified landscape is now structured and divided; its homogeneity is lost. It is the main task of historical geography to reconstruct the former state of a special landscape, even more to search for regularities of emergence or decline of cultural landscapes in general. 5 The reconstruction can focus on different aspects, for example the geomorphological situation, but also on historical settlement conditions, the using of agricultural areas or the course of the former road system. There are different methods of reconstruction, scientific approaches like geodesy and geophysics, climatology or pollen analysis, as well as historical or philological approaches like analysis of written sources, archaeological data or onomastic material. 6 It is necessary to combine the results of all methods if the picture of former days' reality should be trustworthy.Considering that, it is important to understand the central concepts of landscape and of space. Especially the definition of space is topic of intensive scientific discussion. The ambiguity of the term allows different approaches and various interpretations, in view of the fact that not only geography but also subjects like sociology or literary sciences are affected. 7 Important and widely accepted is a