The aim of the work is the study of the relationship between new and old, between things being built and already built. The summary of this work shloud allow us to learn more about design proposals for future cities. The work will serach for the proportional relations in dimensions , volumes, and distances or in between objects. The range of researched areas will not be restricted by any land use, but will be limited by the age-built in last 20 years and by the size of ots plot area. Prague will be used as a case study.