Cities play an important role in various contexts such as society and economy but also sustainability and ecology. In many countries, urban areas host a large number of people working in the industrial sector, and also include main touristic sites as well as governments and administrations. City development has a high impact on the economics of a country as well as on the living quality of its inhabitants. Therefore, cities can be considered as complex systems and summarizing all aspects of urban life is a challenging task. Even though cities continuously change, many of them still show traces of historical events and keep historically grown aspects of composition and infrastructure. Thus, urban areas are not only a set of buildings and streets but they include complex dynamics of infrastructure and also their population. Here, we do not only see daily movement in various transportation systems but also structural changes regarding the movement of subgroups of the population within the city regarding housing possibilities. Thus cities reflect socio-economic history and at the same time show current societal and economic changes and their effects.