The shop was designed on the southern parts of two adjacent storeys (ground floor and first floor) and connected within them by new communication elements: an open staircase and a passenger lift. According to commercial principles, the main entrance to the shop was arranged just behind the main entrance to the building leading to the common part (passage) between two inner yards. The central part of the shop on the ground floor houses the main shopping hall, which was organized as an open surface with walls having built-in shelves and free-standing furniture away from the pictorial views. Three corner shop windows from Kościuszki square were completely open to reveal shop interiors.