In designing this development project directly connected to the Bořislavka metro station, we made use of the distinct local terrain and, knowing that there used to be a path connecting the site to Prague Castle, decided to make the future development permeable. Taking the irregularly shaped and steeply sloping plot as a starting point, we then used the method of fractal similarity to create four crystal-like buildings, the form of which we gradually refined as we developed the internal layouts. The irregularity of the building volumes is not arbitrary; the crystal-like geometry defines the permeable city block structure and, at the same time, is well suited to the internal circulation. Despite its unconventional character, the project is a publicly accessible urban block defined by a basic platform, from which rise the individual crystals – office buildings. The aim was to give aesthetic value not only to the buildings-crystals themselves but, more importantly, to the space around and between them. A covered passage with shops and services forms the backbone of the platform, leading from the Bořislavka metro station all the way to the sloping Evropská Street. For this important space, which offers views of the Prague Castle, we designed a small piazzetta, complete with a statue by Federico Díaz. In addition to allowing for free circulation on the outside of the buildings, the concept of the Centre also provides for public permeability inside the platform, and offers a barrier-free connection between Evropská and Kladenská Streets, overcoming the height difference between them with a system of covered passages situated on two levels, and providing several covered entrances to the metro station. We used glass façades to underline the crystal-like shapes of the individual buildings, but we aimed to suppress the usual effects, such as reflection and transparency; the expansive glass surfaces do not symbolise modernity or domination of office typology, but only serve as a means of expressing the distinctively shaped volumes and delineating the public spaces. Glass is not used to add lightness to the structures-crystals but, on the contrary, symbolically expresses their compact volume and tectonics, as they sit firmly on their shared platform.