The “Four Great Ancient Capitals”: Nanjing is one of China's “Four Great Ancient Capitals” (四大古都, Sì Dà Gǔ Dū), along with Beijing, Xi'an, and Luoyang. Its status as a capital city for numerous dynasties—most famously the “Six Dynasties” (222-589 AD), the early Ming Dynasty, and the Republic of China (1927-1949)—cements its place in the heart of Chinese history. It is often referred to poetically as “the ancient capital of six dynasties” (六朝古都, liù cháo gǔ dū).
A Symbol of Both Glory and Suffering: The cultural identity of Nanjing is deeply dualistic. On one hand, it represents the splendor, art, and power of imperial China. On the other hand, it is an indelible symbol of national suffering due to the Nanjing Massacre (南京大屠杀, Nánjīng Dàtúshā) in 1937, a horrific event during the Second Sino-Japanese War. This history gives the city a solemn and resilient character. Mentioning Nanjing in a historical context often carries a heavier weight than mentioning other cities.
Comparison to Western Concepts: In Western history, capitals like London or Paris have often remained fixed for centuries. China's history, however, saw the capital move with different dynasties and political powers. The existence of a “Southern Capital” (Nanjing) and a “Northern Capital” (Beijing) simultaneously at times, or in succession, reflects a different concept of a nation's power center. It was less about one single, permanent city and more about a strategic location that best served the ruling dynasty.