Daewoo Building a symbol of the Korean Development is located in front of Seoul Station. In this renovation project, “Seoul Square”, we focused on maintaining the outer appearance of the building which is a historic symbol. This design decision was made to keep the building’s value as well as to have continuity in the city-landscape. The interior of building focused on creating a new image to have a clear contrast with the exterior of the building. The image of the building, light, flexibility, eco-friendly, are expressed by the space composition with material choice, color, light and art works. With all this, it helps create a clear unity in Seoul Square.