"Public spaces have an important role for development and maintenance of individual and public life in the historical progression. These spaces have supported social needs like communication and entertainment in addition to the daily needs like getting food, water and etc. But, the changes of the social life have affected the functions and qualities of public spaces. Today, the functions of agora, plaza and square are being carried to specialized places, houses and even in virtual spaces; and the changing conditions are affecting on kinds and qualities of public spaces.The physical problems of the cities which are over grown, crowded and dense depending upon the social, economic, and urban conditions created by the industrial revolution; and the possibility of constructing huge, day lighted and entire spaces using the developing technologies of steel and glass have caused the tendency of moving some urban public space activities to inner spaces and new kinds of enclosed public spaces emerged. Atrium is one of these enclosed spaces that depend on the idea of including positive qualities of urban public life and nature.Today's atriums are defined as "central, organizing, day lighted, interior" spaces. Atrium is a space seen in buildings which are used by large amounts of people like public buildings, offices, hotels, cultural, education and health care facilities. In every kind of building type, organizing, functional and public space properties varies. Atrium is a space that can provide many physical, social and economical functions in the building and this can be considered as the reason of its popularity. Atriums have an urban role because of being used as a meeting, leisure and socializing space that provide safe, enriched and pleasing ambiance. Atriums provide spaces protected from negative conditions, containing different activities and nature and art elements so people can get far away from the depressing city, spend good time and relax.Atriums have a central role for spatial organization, orientation and circulation; and have day lighting and energy save advantages. In addition to these physical functions, their spatial qualities present alternatives to city's negative conditions; they are also attraction points in the city. Especially for commercial buildings, atriums have a widespread public use according to their urban role and spatial properties.Atriums can have different forms in the building, and can be connected with the building spaces and the environment in different ways. In the context of placement in building and relationships with inner and outer spaces, atriums can have different degrees of openness and present different spatial organization and circulation schemes. From 1960's in America and Europe and from 1980's in Turkey especially in shopping centers, atrium has been a space used densely. The reasons of this rising trend depend on the spaces' qualities, environmental factors and relationships between building functions and users. In late 1980's in Turkey, depending on the development of shopping centers, atrium has been a space densely used and became popular. The atrium buildings are mostly constructed in the suburban areas to create attraction centers but in the city centers, constructing atrium buildings on these restricted and expensive areas is not preferred in Turkey.There are different opinions on the public space property of atriums. According to some researchers, atriums can be considered as public spaces, but for some of the others, the atriums are not true public spaces because of the access control and selectivity of entrance over them; these spaces are designed especially for commercial proposes. In the other hand some examples of atriums are blamed that they have a vacuum effect on the life of true public spaces like street and plazas. In this study, it is noticed that atriums especially in public buildings and shopping malls, have many of the public space properties regarding to the function, meaning and perception. Because of this reason, atriums can be considered as semi-public space and this statute has different levels from private to public for different kinds of buildings or for a definite building. Effects of atrium space on consisting public life are another discussing point of the study. In the study titled "Atriums in the Context of Contemporary Public Space”, in the context of contemporary public space concept; public space qualities and environmental effects of atriums will be pointed out regarding to the examples of Turkey and world."