The new museum refers to the existing Main Building, both in volume and rectangular form. The existing vertical structural divisions on the Main Building's eastern façade passes into the construction of the new building first in the form of a roofed glass hall, and then define its entire structure.
The building has a clearly noticeable division of an open (public) zone on the ground floor and a closed (exhibition) zone above it. Therefore, the ground floor was fully glazed to connect the interior of the building with the surrounding space, while giving a sense of integrity and spaciousness. The aim was to invite people inside the museum. The window-free exhibition part arouses curiosity and encourages visitors to visit the exhibition. From the outside, it gives the effect of levitating mass over the square and greenery penetrating under the building.
The exhibition, the so-called heart, begins on the ground floor. At this level you can quickly see monumental paper sketches of Wyspiański's Franciscan stained glass windows, as well as on special multimedia touch screens view the collection of art found in the museum.
On the first, second and third floor there is an open, easy to arrange and flexible to change space without permanent divisions, designed for modular narrative exhibition.