This research examines the materials and the rehabilitation techniques of buildings from bearing masonry. Any intervention in the buildings of our cultural and architectural heritage ought to obey the international conventions and declarations, and to respect and highlight the particular morphological and typological characteristics of the buildings. The study of pathology and the choice of appropriate methods and compatible materials are crucial to the successful restoration of the construction and, consequently, its reintegration into the urban city web. Depending on the condition and the damage of each building, and based on the Intervention Study, the recovery methods are selected for each element separately, by initially removing the subsequent additions that alter its form. All the elements of the construction are examined and maintained step by step, starting with the bearing elements, then the supposed elements, and ending with the painting of the building. The intervention is made by contemporary methods, materials and specifications, in cooperation with the traditional materials and techniques used in the construction of the building. As an example is presented the Old Railway Station of Larisa. The whole complex of the Station in Larisa remains unused, unlike the corresponding complex in Volos, which has been restored and operates normally. The building of the Station in Larisa suffered serious disasters, mainly in the bearing stone and roof, culminating in the demolition of its upper floor, and today its morphology has significantly changed. In this research, it is proposed that the Station should be restored and transformed into a "Museum of its own", showing its connection to its place and its history, by linking the past with the present and the future.