A public space is one of the basic components of the city due to the multiple functions it rolled, which make its importance clear over the history as a social and political space where many different activities took place. The 21st century is witnessing an increasing interest and care in public spaces due to their importance in absorption of overall future challenges that the city are facing. Accordingly, the research has been crystalized to be the necessity to determine the indicators of assessment public spaces of the twenty first century public spaces according to the public dimensions of the public space. Subsequently, the objective of this research is to clarify the role of public spaces in the formation of city center by assessing the friendliness of public spaces by meeting the individual’s requirements and needs in the urban environment. To achieve that, through making the indicators of urban performance as an assessment tool to assess public space friendliness to publics, thus their responsiveness to 21st century context. Therefore, this study discusses the concept of urban performance and its classification within urban space. It shows the most important dimension of urban space which is connected with one of the strategies of urban design concept of urban integration to get a summarized conclusion of theoretical framework to apply in practical way on one of the most important urban spaces in Baghdad (Al-umma park) as a case study.