Crystal office is the latest addition to Prague’s Vinohrady district. The striking building adds a new dominant feature to this architecturally-rich residential and business area.

The new Crystal office building, beside the busy Vinohradská boulevard, was constructed and completed in the summer of 2015. The new administrative complex is situated opposite one of Prague’s largest cemeteries, Olšany, and the bizarre-looking post-modern 1990s Don Giovanni hotel. On the same side of the street is the modernist 1960s Casablanca tower and a long block of Czech savings bank offices, all designed by Atelier 15 architects.


Commissioned by the GES REAL development group, the structure of the building with a total of 12,827 square meters, comprises of offices available for rent and five retail units on the ground floor, including a café and a brasserie. Warehouses, technical facilities, and 121 parking spaces are concealed underground.

“Walking around the outside of the building, the reflected and refracted light give an impression of dynamism”Libor Hrdousek & Radek Lampa (Atelier 15)

Attractive high-rise building

The Crystal building's height exceeds the height of surrounding structures, creating a high-rise counterpart to the nearby Casablanca office tower that subtly and sensitively fits in with the existing urban environment. “Its significant height and shape means that this building has a unique and unexpected look, from every angle”, says Libor Hrdoušek of Atelier 15, who together with Radek Lampa, designed this geometrically rigorous yet organic structure.

The Crystal building has two main parts. On the Vinohradská side, it rises a total of fourteen storeys. The façade of the second part stands alongside the much quieter Kouřimská street on the opposite side of the site. The building has fewer storeys on this side, in keeping with the roof line of the other buildings in the street. Together, the larger and smaller volumes create a compact architectural landscape unit, sliced by a striking sharp chasm, which inspired its name.

The Crystal building has two main parts. On the Vinohradsk side it rises a total of fourteen storeys
Office building Crystal situado en Prague, República Checa

The volume has been covered with a chessboard-like glazed surface

Chessboard appearance

The volume has been covered with a chessboard-like glazed surface. “The façade was designed to conjure up the concept of a crystal. This chess-like visual structure is also used on the roof parts to visually unify all exposed sides of the building. Walking around the outside of the building, the reflected and refracted light give an impression of dynamism. Clarity and light underpin the strength of the composition”, says the architect.


Petr Nevšímal, general manager of façade fabricator Nevšímal adds: “To produce a complete skin for the entire Crystal building, we used a modular façade, which proved to be the only truly ideal solution for this project. This type of façade also facilitated other aspects of the project: the shape of the object, the segmentation, maximising the use of the land, the construction time, the physical characteristics, and of course the architectural assignment.”

The implementation was relatively complex, and some elements had to be custom made for the project. “The shape of the object did not allow the use of standard system profiles, so we had to add custom-made elements, including corners and channels. The shape of these profiles was prepared using 3D models of the objects. Together with Reynaers, we developed a solution that incorporated drainage modules, used for example on sloping surfaces. We appreciated the constructive collaboration with the company and its support”, Nevšímal concludes.

Libor Hrdousek & Radek Lampa (Atelier 15)

Libor Hrdoušek and Radek Lampa are both graduates of the Czech Technical University in Prague. They founded the architectural studio Atelier 15 in 1997. Since then, they have focused on the design and construction of various architectural projects including office buildings, hospitality and sports facilities, urban developments, and residential buildings, including individual houses. Hrdoušek is also a member of the Czech chamber of chartered engineers and technicians. Radek Lampa is the head of the architecture studio at the Czech Technical University in Prague.

Petr Nevsímal

Petr Nevšímal was born in Nymburk in 1980. He is a graduate of the Faculty of Civil Engineering at the Czech Technical University in Prague. He is the director of Nevšímal, a family-owned company that has dealt in exterior façade cladding since 1993. Since its foundation, the company has grown to become one of the most prolific construction and manufacturing firms in the Czech Republic. Outside the Czech Republic, the company is also active in developing expertise in fire-resistant construction. In recent years, Nevšímal has worked on a number of important projects including the KCEV environmental centre in Vrchlabí by Petr Hájek Architects, and experimental residential projects such as Villa Hermína by HŠH Architects. “Every problem has a solution, and nothing is as difficult as it first seems’’. is his motto.

CW 86-EF/HI Typical element

Project solution

Systems: Bespoke solution based on CW 86-EF/HI with integrated opening elements, CS 86-HI windows, CS 86-HI door, CW 50-HI FRV, CW 50-HI

Project description:

  • Development of CW 86-EF/HI bespoke façade solution to match static requirements of the building (windloads)
  • 300 m² of CW 86-HI element façade, of which 15% is inclined
  • 3 new profiles and 4 new gaskets for vertical elements
  • 3 new profiles and 2 new gaskets for inclined elements (17°)
  • CW 86-EF/HI profile shape (inner part) was modified to enable more flexible anchoring position and better possibilities for profile corner connections
  • Bespoke corner solutions
  • Bespoke cascade drainage solutions for inclined elements by use of bespoke gaskets and special glazing beads
  • Floating windows from system CS 86-HI/HV (vertical façade elements) and CW 50 Flush Roof Vent (inclined façade elements) placed within typical CW 86-EF/HI modules with use of CW 50 standard transoms


  • CW 86-EF/HI façade elements: 1350 x 3700 mm
  • CS 86-HI /HV turn-tilt windows: 1308 x 1250 mm
  • CS 86-HI high intensity entrance doors: 1190 x 2930 mm


  • 30 mm double glazing
  • 8/16/6

CW 86-EF/HI vertical section

CW 86-EF/HI horizontal section

CW 86-EF/HI vertical section inclined element - drainage solution

Prague, República Checa View on map
Vojta Zikmunda Marek Hrubý
Otros colaboradores: 
Prague Real Estate Invest (Investors) Metrostav (General contractors) GES REAL a.s. (Project developers)
Project solutions: 
CW 86-EF bespoke solution