Historical buildings are heritages that play a strategic role in the sustainable building environment need to be protected, and the continuation of the building stock from the past to the present should be ensured. With the concept of adaptive reuse, it is important that historical buildings gain new functional features with contemporary additions, ensure the continuity of cultures and carry the traces of the past to future generations. The aim of this study is to determine the adaptive reuse strategy of historic buildings, and to observe how contemporary additions are integrated to maintain a sustainable form of conservation. The research question of th study is how the contemporary additions that can meet the needs of the reuse of the historical buildings are applied. The building samples obtained through the literature review were evaluated in terms of physical aspects include criteria such as the size and mass of the additions, material selection, and the suitability of the existing historical building to the new function by using the comparative analysis method. It has been determined that although the designs of the additions are different from each other, most of the additions to the existing buildings are made for commercial and cultural purposes and involve steel and glass materials. The built environment can be revitalized as a result of bringing these buildings to society, using new functions and contemporary materials, and introducing economic, socio-cultural, and environmental innovations.

The tessellation method, which is a mathematical concept used in geometric design, is also used in architecture and engineering, as in many other fields. In this study, it is aimed to investigate the tessellation configurations in structural systems within the scope of geometric design in architecture, to show the effectiveness of geometry in the architectural production in these structures and to highlight the tessellation-structure relationship. The number of studies emphasizing tessellation configurations in structural systems is limited. For this reason, the study will contribute to the literature. The research question of the study is how tessellation configurations are applied in structural systems and how this relationship is established. Depending on this research question, eight architectural buildings in different cities with different tessellation configurations were examined within the scope of this study. Content analysis was performed by looking at the architectural features of these structures, and a comparative analysis framework was created with the data obtained. Inferences were made on geometric and architectural features. As a result, it has been seen that tessellation patterns are used and will continue to be used on a wide scale in structural design.