عنوان مقاله [English]
Some elements of architecture may to be persistent in vernacular architecture in couse of function, comfort and sense of belonging to the place. These elements sometimes evolved and altered from an vernacular architectural element (such as a central courtyard or porch) to an index traditional architectural. In Iran, traditional residential structures are usually divided into two parts, the inner part which is the private sector so called interior or Andarouni and exterior part which is the place of reception of guests or public which is named Birouni. The purpose of this study is to identify the evolution of the two elements of the central room and the surrounding corridor in the vernacular architecture of Khorasan and the role and influence of these elements in emerge Interior and Exterior in the Iranian house. The research method is descriptive-analytical and the data have been collected and analyzed through library resources. In order to achieve the purpose of the research, an attempt was made to study the maps of pre-Islamic monuments according to respectively chronology. The results of this study show that the two elements of the corridor and the central room are components of the vernacular architecture of Khorasan from the second millennium BC and in post-Achaemenid period corridor and central room combined with columnar porch as a components of vernacular architecture of western and northwestern Iran and it forms plan of Ayadana (Tarma-house).The corridor element has showed an important role in the emerge approach introversion in Iranian buildings, especially in the Khorasan region and has been an important factor in the interior emergence of the Iranian house. The corridor is eliminated with the arrival of Islam in Iranian architecture, but after that corridor remains as nostalgia in the movement system of the Iranian house (in stance: Gholam Gardesh or Mardgard).