黑门, also known as the "Black Gate," is a historical site located in Nanjing, China. It served as one of the main entrances to the ancient city during the Ming Dynasty. The gate is notable for its impressive architecture and strategic significance in protecting the city from invasions. Today, 黑门 is a popular tourist attraction, drawing visitors interested in Chinese history and architecture. The site offers insights into the city's past and showcases the craftsmanship of the era. Surrounding the gate are various cultural landmarks, making it a key point of interest for those exploring Nanjing.