The Temple of Heaven is a grand religious complex in southeastern Beijing, China. Constructed between 1406 and 1420 during the reign of the Yongle Emperor of the Ming dynasty, emperors used it to perform annual ceremonies of prayer to Heaven for a good harvest. The architecture is a masterpiece of Ming design, featuring symbolic elements that reflect the connection between the heavens and earth. Its most famous structure is the Hall of Prayer for Good Harvests, a large circular building with a triple-gabled roof, constructed entirely of wood without using nails. The temple, now a UNESCO World Heritage site, represents the pinnacle of ancient Chinese ceremonial architecture.