The design concerns the renovation of the old 'Wertheim' department store and its extension in the eastern direction, which involves the new part located by Czysty square and Czysta street. The original design based on Herman Dernburg's design erected in 1929 at the intersection of Świdnicka and Podwale streets. The main objective of the new design was to continue the style and form of the existing architecture and creating the building referring to the old department store with its elegant look and high standard. The consistency of the old and new parts was achieved by correct proportions, inscribing the new building into the historical urban structure, horizontal divisions of the facades, character of used materials and colours. A dynamic nature of the horizontal facade of the new part was intensified by a fan-shaped deflection of cornices, which create a very strongly emphasized facade foreground. Its background is created by large windows and walls finished with dark-brown fibre-concrete cladding panels, corresponding the ceramic facing of the antique edifice. The new building is connected with the antique edifice by an entrance atrium, which serves as a connecting element (buffer) between the two parts.

The design also involves the landscape design of The Czysty Square and the rebuilding of Podwale and Czysta streets, which will increase the quality of the area surrounding the department store and re-engage them with city life.