Yongle demoted Nanjing to a secondary capital and in 1403 announced the new capital of China was to be at his power base in Beijing. Construction of a new city there lasted from 1407 to 1420, employing hundreds of thousands of workers daily. At the center was the political node of the Imperial City, and at the center of this was the Forbidden City, the palatial residence of the emperor and his family. By 1553, the Outer City was added to the south, which brought the overall size of Beijing to .