On February 18, 1853, Chiu-chiang fell to the rebels, who went on to take Anking. Less than a month later, on March 19, the Taiping forces captured the beautiful city of Nanking, which was renamed T'ien-ching (Heavenly Capital) to commemorate the occasion.
Source: wiktionary
Toward the end of 1860, as told in his book, Lindley, together with his Portuguese fiancée Marie, a British friend he called “L.”, and a Greek friend B. Philip, joined the Taiping Army at Tianjing (Nanjing) — the capital of the Taiping Kingdom.
Source: wiktionary
After a fierce battle, Hong and his men established control over the city of Nanjing, which they promptly renamed Tianjing, or Heavenly Capital.
Source: wiktionary