The plaza area at the Great Mosque of Central Java is a non-green open space of the Central Java Grand Mosque building complex. The Plaza area has an important role in the building, because the plaza area at the mosque is the first place we meet, and becomes the center of circulation and socio-religious activities for visitors. Thus, it is necessary to design a plaza area at the Grand Mosque of Central Java which considers all aspects. Open space has a role as a container that can accommodate certain activities of the community in certain areas, therefore open space has a contribution to be given to humans in the form of positive impacts. This research was conducted at the Grand Mosque of Central Java using qualitative-descriptive methods. This research focuses on studies in the plaza area of the Grand Mosque of Central Java in terms of open space functions. The results of this study, in the plaza area at the Great Mosque of Central Java, show that it has not fulfilled both as a general function of open space and an ecological function.

The mosque's architecture was built to reflect the physical environment in which Muslim communities manifest their religious devotion and way of life. This study tries to reveal the community's sociological and cultural picture in traditional mosques' architecture. It analyzes the people's devotion and religious beliefs in designing and constructing traditional mosques. The case study method applied consisted of building measurements in the field, field observations, and interviews with expert informants at the Kajoran Mosque, Klaten. Based on the research results on the Kajoran Mosque's architecture, it can be seen that the architecture of the Kajoran Mosque in Klaten facilitates social activities for the community around the Kajoran Klaten Mosque. The presence of a mosque porch is used for religious activities such as tahlilan, sodaqohan, prayer together, and routine worship.

The Great Mosque of Central Java has an area called the plaza, namely Zone I, the Pillar area, and Zone II, the Payung Hidrolis Plaza Area. Preliminary observations by researchers showed that there was a suspicion related to the architectural settings of the plaza relating to the attributes of the congregation prayers, which were in the Great Mosque of Central Java. The method that will use in this research is the quantitative method using a descriptive approach. In this study, the independent variable is the perception of visitors in using the Central Java Grand Mosque plaza space with observational indicators of visitors' motivation, interests, and expectations. The dependent variable in this study is the hall attribute as a means of visitors to the main prayer room, which divided into two zones, namely: Zone I (alqonatir Pillar area) and Zone II (Hydro Payung Plaza Area). Field data collection was carried out on 300 respondents. Data collection was carried out for one week with division in 2 zones and two different times, namely afternoon and evening. Based on the results of research that has done that, there is a relationship between the function of the plaza of the Great Mosque of Central Java to the attributes of worshipers in Zone 1, Zone 2, Zone 1 and Zone 2.