The discourse of the city as a conceptual structure is the state of its legibility. In the most basic sense the phenomenon of 'legibility' is related with the citizens' or/and visitors' perception and interpretation the city. In this context, any kind of perspective set out to understand the city has the potential to turn into an urban reading method that centralizes different interpretations. By resolving the complex structure of the city, each historical formation can be called as a 'layer'. It can be realized that each layer produces an integrative transformation by affecting and converting both the previous and next layer to itself. One of the most important point in this transformation process is the perceptive metamorphosis occurred in the "observer" and "observed" relation. According to Quantum Theory, the "observer and observed awareness" based to the idea that each new observation proves a new perception. It indicates that the observer and the observed components influence each other by creating a different whole at every single time. So observing an event as an observer makes it possible to discover both the monitored thing and her at the same time. Thus, it can be understood that in the development process of the city's architectural layers, notions like 'experience', 'audience', 'impression', 'observer' and 'observed', are always in a continuous interaction and transformation. Thus, while a structure is the observer subject in its historical layer it can become an observed object when another layer is added.