Tianqi (simplified Chinese: 天启; traditional Chinese: 天啓; pinyin: Tiānqǐ; Wade–Giles: T'ien-ch'i; lit. 'heavenly opening'; 22 January 1621 – 4 February 1628) was the era name (nianhao) of the Tianqi Emperor, the 16th emperor of the Ming dynasty, lasting for 7 years.
On 2 October 1627 (Tianqi 7, 24th day of 8th month), the Chongzhen Emperor ascended to the throne and continued to use the Tianqi era name. The following year, the era was changed to Chongzhen.[1][2]