The Kalaja Fortress Adaptive Reuse project began as a research thesis by Sadik Šaipi at International Balkan University. The project’s aim was to restore and revitalize the fortress, a historically significant site in Prizren, Kosovo. From the outset, the client (International Balkan University) envisioned the project as a way to explore architectural conservation and sustainable reuse. The municipality of Prizren, a potential future stakeholder, is keen to preserve this cultural landmark while integrating modern functionality. The project combines heritage conservation with contemporary interventions, such as a visitor center, exhibition spaces, and a rebuilt mosque. The project has already made an impact by raising awareness of the fortress’s significance and potential as a cultural tourism destination. It holds the promise of revitalizing the area, contributing to community development, and enhancing regional tourism, offering a model for sustainable adaptive reuse in the region.