The thesis focuses on the temporary housing of the homeless people of Thessaloniki and their parallel education and support in order to reintegrate as active and independent citizens in the society. All structures for homeless people are staffed by non-governmental organizations and the buildings that currently house these structures are no more than apartments with limited functionality and facilities, which are temporarily rented for these purposes. This observation was the main reason for choosing this subject. The research focuses on the study and the design of a center that gathers the necessary structures and houses them in a single space to function more efficiently and not have a temporary character. The site was chosen based on a number of reasons. An empty plot of land was needed in the western part of the city with sufficient space for the development of the program and one that offers easy access to the city and transportation, without disturbing the cohesion of the local community. Based on the above, the selected site is located on the corner of Giannitson and Dafnis street in western Thessaloniki, in a region with evident commercial and industrial presence and fewer residences. The building program for the center includes structures for housing the homeless as well as facilities to support and educate them to achieve autonomy and reintegration into the society. The separation of different functions is done in three separate buildings. The first one features a day center, resting areas, a dining room and the main dormitory. The second building has rooms for hosting families with children or other more independent people with high training and skills. Finally, the third building has training areas, classrooms, a library, an infirmary as well as counseling and support services.