The Forbidden City
The Royal Palace complex in Beijing was home to the emperor, a “son of heaven, and as such forbidden to ordinary people.
Completed in 1420, the architectural wonder is made of many buildings surrounded by a two-mile-long wall and a moat. The emperor’s throne was found in the largest of the buildings, the Hall of Supreme Harmony, atop three-tiered marble terraces.
https://www.rd.com/list/most-beautiful-man-made-structures/