A city is reactive, never inert. Dynamics within it are the reactions of a collective, catalyst for innovation in possible actions amongst places and culture. The initial stage of the project was to seek a general answer to the question what makes a city active. Understanding an active city cannot be separated from understanding the background and the structure of its society as well as subtle factors that anchor them in this particular space. This link between flows of population and their heritage seen as footprints left in time and space is a key to understanding nature of every city.