Huế is the former modern capital of Vietnam. It is well known for its monuments and architecture. It is the capital city of Thừa Thiên Huế province. Its population stands at about 340,000 people. On the north side of the river is the Citadel, the centre of the historic city. Most of Huế's important monuments, temples, and pagodas are found in this area. The south side of the river is newer, and contains most of the city's business and residential areas. Huế's most outstanding attractions are the royal citadel, an imperial city and the emperor's tombs. Huế's complex of monuments is listed among the UNESCO's World Heritage Sites.