Ky Dai (The Flag Tower) is one of the cultural symbols of Hue Ancient Capital, an architectural relic of the Nguyen Dynasty.

Along with Bach Ho Bridge, which is a railroad bridge, and Thao Long Bridge, with the architectural structure of a bridge at the top and a dam below to prevent salinity at the bottom, there is a total of seven bridges over the Huong River, namely Truong Tien Bridge, Phu Xuan Bridge, Da Vien Bridge, Tuan Bridge, and Dinh Market Bridge.

At the seminar "Hollowness and Open Space of the City" jointly organized by ASHUI, Tich Thien Vien and Thua Thien Hue Association of Architects, speakers and architects with diverse perspectives exchanged many interesting stories and experiences about gardens and open space inside houses and the “hollow and open” space within the city.