The new exhibition space of the Lithuanian National Museum, called HOUSE of HISTORIES (ISTORIJŲ NAMAI), is a barracks-type building constructed in 1878, along with other buildings of similar purpose on T. Kosciuškos Street. This construction took place after the dismantling of the Vilnius fortress established by the leadership of Imperial Russia. Although there is limited archival data about the building, it is known that in a description from 1990, the structure at T. Kosciuškos St. 3 was identified as the educational building of a school dormitory. The final concept chosen for the HOUSE of HISTORIES involves open storage facilities on the ground floor, featuring permanent and changing exhibitions on the first and second floors, along with planned events, concerts, and a space for a cafe in the courtyard. The building, with its historical significance, posed a specific challenge for architects and project planners: to preserve the historical volume, facades, spatial structure, side historical staircases, arches, and vaults in the basement. To accommodate exhibitions, additional stairs were needed. Choosing a dominant functional element, modern internal stairs resembling arches were selected to guide visitors through the exhibition without traversing utilitarian-administrative spaces with side stairs. These central stairs allow visitors to explore exhibits without leaving the exhibition spaces, providing a clearer understanding of the exhibition atmosphere and better orientation in the building. The new space, encompassing the first and second floors, was designed for changing exhibitions. The focus was on creating versatile equipment that could be modified according to the needs of each exhibition concept. The equipment manufacturer, FRANK showcase systems (Germany), is one of the best in the world, serving museums in Paris, London, and elsewhere. Storage facilities are installed in the basement, and the administrative rooms on the first and second floors together make up over 2300 square meters (for comparison, about half the exhibition area of the Palace of the Grand Dukes). The ground floor features an open-type storage area, allowing visitors to view exhibits accompanied by museum staff.