North of the Hall of Union (Jiaotai dian), the Palace of Earthly Tranquility (Kunning gong) was built for the chief consort of the emperor. The empress did not live here. It was the bridal chamber for the Kangxi (r. 1662-1722), Tongzhi (1862-1874), Guangxu (r. 1875-1908), and the abdicated Xuantong (r. 1909-1911) emperors. The couples only spent their first two days of marriage in this palace. Then they moved to live in the Palace of Heavenly Purity (Qianqing gong) or the Hall of Mental Cultivation (Yangxin dian).