The Hall of Mental Cultivation is a building in the inner courtyard of the Forbidden City in Beijing, China. The hall is a wooden structure with dome coffered ceilings, and was first built during the Ming dynasty in 1537, and was reconstructed during the Qing dynasty. During the early Qing dynasty under the reign of the Kangxi Emperor the hall was mostly used as a workshop, wherein artisan objects like clocks were designed and manufactured. From the reign of the Yongzheng Emperor during the 18th century, the hall was the residence for the emperor. Under the reign of the Qianlong Emperor until the fall of the Qing dynasty, the hall became the centre of governance and political administration. In the Western Warmth Chamber, the emperor would hold private meetings, and discuss state affairs with his mandarins. After the death of Emperor Xianfeng, from inside the Eastern Warmth Chamber, empress dowagers Ci'an and Cixi would hold audiences with ministers and rule from behind a silk screen curtain during their regencies for emperors Tongzhi and Guangxu, who both succeeded to the throne as children in the second half of the 19th century.