Yongdingmen was once the south gate of the outer city of Beijing's old city in the Ming and Qing Dynasties. It is the highest-regulated of the seven gates in Beijing's outer city. It shows the important position of the building on the central axis of Beijing and witnesses the traditional urban management methods of the Ming and Qing Dynasties. The original Yongdingmen was demolished in the 1950s. The existing Yongdingmen is a landmark building that was rebuilt in 2005 in strict accordance with the principles of Chinese cultural relics protection. The image of the Yongdingmen tower marks the location of the southern end of the Beijing central axis, showing the traditional form and craftsmanship of ancient Chinese tower buildings, and has become an important landscape viewpoint for overlooking the southern section of the Beijing central axis. Yongdingmen is a historical symbol of the southern end of the Beijing central axis. It faces Zhengyangmen from north to south and is an important landscape node in the southern section of the central axis. The historical site of Yongdingmen consists of the rebuilt tower building and the ground sign of the south side of the city wall. The Yongdingmen tower was rebuilt on the Yongdingmen for the purpose of display according to the original form. Because the city wall will no longer be restored, the original location of the city wall is marked on the ground on the south side of the tower. At the same time, the positions of the original horse path and the city wall are marked with white punctuation on the south facade, north facade, and east and west ends of the city platform. The marked positions and sizes truly reflect historical information. As the south gate of Beijing's outer city, Yongdingmen is an important part of the city's defense system and urban management facilities in the Ming and Qing dynasties, and is part of the national etiquette tradition. With the rise of commerce in Beijing's outer city, the population living in Yongdingmen has continued to increase, handicrafts and commerce have developed, and Yongdingmen has also become an important channel for merchants to travel. Today, the rebuilt Yongdingmen tower and the ground pavement of the city wall clearly mark the position of the southern end point of Beijing's central axis, accurately showing the historical form and traditional craftsmanship of Yongdingmen. Yongdingmen was first built in the 32nd year of Jiajing in the Ming Dynasty (1553). In order to strengthen the defense of Beijing, the Ming Dynasty built an outer city with 7 city gates, of which Yongdingmen had the highest regulation level and the largest volume. In the 43rd year of the reign of Emperor Jiajing (1564), the Facheng was built on the south side of the Yongdingmen Tower, and in the 15th year of the reign of Emperor Qianlong (1750), the Facheng Arrow Tower was built. In the 1950s, in order to ease the traffic pressure in the Yongdingmen area, the Yongdingmen Tower and the Jie Tower were demolished, and the moat was straightened and dredged to widen the roads in the Yongdingmen area. In 2003, the Beijing Institute of Cultural Relics conducted archaeological exploration of the Yongdingmen site, and a total of 7 trenches of varying lengths were excavated to determine the boundaries of the site. In 2004, the reconstruction of Yongdingmen began and was completed in 2005. The project was strictly based on the research results of archaeological and historical data. The reconstructed Yongdingmen marks the location of the southern end point of the Beijing Central Axis.