Vo Trong Nghia Architects designed this torus-shaped stone house in Dong Trieu, Quang Ninh Province, Vietnam. In geometry, a torus is a surface of revolution generated by revolving a circle in three-dimensional space about an axis coplanar with the circle.
The rooms surround the oval courtyard, making a colony-like relationship with each other. Circulating flow runs around the courtyard and continues to the green roof, connecting all places in the house. This courtyard and green roof compose a sequential garden, which creates a rich relationship between inside and outside of the house. Residents discover the changes of the seasons and realize their wealthy life with the nature, thanks to this sequential garden.