The aim of the work is the study of the relationship between things being built and already built in the built-up areas, because there are many arguments for building within the city borders. The work will search for the proportional relations between objects. Relations and different qualities will be compared and classified based on the comparative methods. The necessity of organic incorporation of each element as well as the whole unit in to the structure of the city will be pointed out. The hypothesis of the importance of physical expression of spaces - street grid and its pattern - for clear orientation and movement of people in the city will be approved by using Space Syntax Analysis; the examples will be distinguish in terms of accessibility, visibility and connectivity. The range of researched areas will be limited by the age by the size of its plot (site) area. Prague will be used as a case study.