Cǽlĭtus is located at the center of Seoul, newly defining the Han riverside skyline. The original goal for this project was to create a landmark that will open a new prospect of residential architecture. ‘Crystal’ is taken as a motive for the elevation, which gives a shape of a ‘prism’ image that displays a unique light that projects the Han River. An L-shaped small park and linear park are made beside the Hangang Park, and additional facilities, canopy roof gardens are continuously built, which is created as a ‘Small Place of Relaxation in the City’. The sky bridge that connects three towers is in a 人 shape (Chinese character for human), which promotes residents’ participation in community activities. This organic design also plays a role of a new landmark at the side of the Han River.