Throughout the architecture history, the definition of architecture has been shifted from "enclosed, worshipful" by encircling confined space to "open, interactive" by building up the urban atmosphere in every aspect (function, space, circulation). The boundary between architecture and urban public space has become more obscure, and the crucial change should be attributed to the moment when architects realize the importance of the relationship between architecture and urban public space. This paper is focusing on the discussion between architecture and public space, with five different projects, in five different sites. As the function, user group, cultural background, and location changes through sites, the complexity within a city/ an architecture rises, especially in the shared zone (public space). The urban public space is born for the public; therefore, the public space follows the public's activities and movements –– sometimes it is created according to how people move through a city between all the infrastructures, sometimes it just grows within a building spontaneously, and sometimes it could happen in the void space in between buildings, or the architecture itself becomes the public space. In most cases, the public space is the area that can be interpreted by a human with their own emotional attachment, and it can be evolved in various forms and typologies. The paper will introduce some possibilities of the relationship between architecture and public space.