The concept of the "sayfiye house" in Istanbul has undergone a significant transformation from the Ottoman Empire to the Republican era. This study examines how the desire to escape the noise and density of the metropolis and the search for a peaceful life integrated with nature and the sea influenced the emergence and evolution of this housing type. The research aims to investigate the historical development and architectural evolution of the country houses and the impact of these processes on the social and cultural history of Istanbul. In this context, the architectural, façade, plan and material characteristics of the country houses and their location within the city are discussed in detail. In addition, the contributions of these houses to society and their effects on social classes are also evaluated. In Istanbul, sayfiye houses have developed in different neighborhoods in different periods, starting from the Byzantine period through the Ottoman Empire to the Republican period. In the Byzantine period, the first settlements were established outside the city center by emperors and nobles. In the Ottoman period, the sultans and the palace circle established rural and sayfiye areas in the Golden Horn, Kağıthane and Bosphorus regions. With the Tulip Period, the Western influence increased, and the country residences were concentrated in the Bosphorus, Kuruçeşme-Kabataş Coast, Arnavutköy, Bebek and Boyacıköy. From the middle of the 19th century, with the development of transportation facilities, the resort culture spread to the masses and regions such as the Bosphorus, Kadıköy-Bostancı, Yeşilköy-Bakırköy, the Princes' Islands and Üsküdar-Çamlıca became popular resort areas. In the course of time, the sayfiye residences developed into different types of buildings such as mansions, villas, beach houses, pavilions, villas and apartment buildings. These buildings provide critical information about the social, economic, and architectural transformation of the city. The country residences play an important role in understanding the social structure and cultural dynamics of the society, beyond just being places of recreation and entertainment. This study provides an in-depth analysis of this type of housing by examining the architectural, social, and cultural aspects of sayfiye residences in Istanbul from a broad perspective. The results of the research make important contributions to the understanding of the social and cultural structure of Istanbul and to the evaluation of the impact of the modernization processes of the period on society. [ABSTRACT FROM AUTHOR]