Beijing is such a loud city, and it was hard to find a piece of peacefulness. DiTan (The temple of earth) offered a place of quietness and all. It was also known as Fangze altar. The altar is the second largest one of five ancient altars in Beijing. Ditan Park was built in the ninth year of Emperor Jiajing reign in the Ming Dynasty (AD 1530), and it was used to be the place where emperors in Ming and Qing feted the "Imperial Land God". The altar is also the largest one among the existing altars in China. The altar is shaped as a square and covers a total area of 37.4 hectares. The structure of building follows an ancient Chinese architecture rule of "round heaven and square land".