Developing technological data in our era also affects the field of building materials and the emerging high-tech materials provide great opportunities to the designer. In this context, different contemporary building materials have started to be used in the restoration processes of historical buildings. Contemporary glass material discussed in this study is a transparent and fragile building material that is often used with traditional materials in historical building restorations. Glass is a material that does not prevent original materials, can adapt to the original condition of the buildings thanks to its transparent feature, and can be recycled according to its use and it has an important place in terms of its potential to be used as a restorative material in the preservation of historical buildings. In this study, it is aimed to determine the architectural compatibility of the glass used in the restoration of historical buildings and to reveal the advantages and disadvantages of the use of glass. In this scope was discussed the Kizlar Monastery, located within the borders of Trabzon province in the Eastern Black Sea region. The study consists of three stages. In the first stage, a theoretical framework on the subject was formed through literature research. In the second stage, the data related to the study area were obtained and the current situation features of the buildings were examined with the field studies and archive documents. In the third stage, glass usage areas were analyzed in the restoration and re-using process in the Kizlar Monastery and processed on plan, sections, elevation and 3D models. The research can be considered as an archival document for the Kizlar Monastery, which has important historical values, and as a contribution to the field of impact assessment of the cultural heritage. In the findings of the study, it was seen that the interventions made for the Kizlar Monastery to connect the past and the future of the building greatly contributed to the original value of the building. As a result, it has been determined that the interventions made by taking care to preserve and maintain the original space flow of historical buildings contribute to the preservation and sustainability of the values contained in the structure.