In the past, it was usually a church or a palace that formed the center of a town. But in a modern society, places suitable for inquiring and sharing of information and the enrichment of experiences have moved to center stage. A city hall is therefore gaining in importance for society not only as a government but also as a place, where the peoples can communicate and enrich each other. The design is guided by the idea of making the New City Hall a new political and cultural center in a daily life – the ‘Agora’ as a new heart of the city. To do justice to this aspiration in town planning terms, it was proposed that the new areal of the city hall assume a special position within the urban structure: as a urban ‘Oasis’ – like a Central Park. The existing urban structure is consistently pursued and the room typology suitable for the contemporary city hall buildings from the Korean building culture is examined. An illuminating archetype of government building or governments areal from Korean building culture is “Yuk-Jo-Geo-Ri” in Hanyang. A special feature here is a broad boulevard-like open space, from where all government organs are accessible. This archetype is combined with the idea of ‘Agora’. Now it has been realised in a contemporary way. The Agora consists of the promenade with the three rows of trees as a spatial frame and the linear central room. This axial open space has a character similar to the main street of the “Yuk-Jo-Geo-Ri” and the space-confining promenade can be seen as an ~nterpretation of “Sang-Dang-SanSeong” oder “Eup-Seong” in a citizen-friendly way. The building which signalizes a new center of a modern society gives a monolithic impression, because the building has a simple shape and the whole building is designed in the grid of 4.00m x 4.00m consistently. An absolute cube is divided into quarters and the outer two parts form the main volume and the middle part an atrium space. This creates a gate-like figure. This atrium is a continuation of the open space ” YukJo- Geo-Ri 11 interpreted in a verticall form. This figure not only reminds of a form of the gate but also the figure of a “Dang-Gan-Ji-Ju”, which is traditionally of great meaning in this place. In the design, only “JiJu” is implemented in the architecture, “Dang-Gan” as a high-rise is indicated as a future extension. The building consists of volume, shell and core. The hard shell out of white limestone with the slim, vertical openings conceals a transparent, light glass shell. In contrast to external solidity, the inside of the disc-shaped body has an open, inviting structure – like a halved walnut. This way, the building unpeels itself spatially towards the inside. In the atrium space, the two bodies are adequately connected by bridges and open spaces.