Temple of Heaven is a vast complex of religious buildings built during the reign of the Ming Dynasty Yongle emperor (born Zhu Di). Completed in 1420, the three-tiered Hall of Prayer evoked and represented the hours, days, months and seasons of the years in an architecture of precise geometry and gloriously colourful timber components culminating in an imperious dome. The 125ft (38m) high temple was constructed without a single nail, the timber columns and rafters slotting together like a giant building kit. The distinctive colours represent various evocations of good fortune, joy, prosperity and the glory of imperial rule. Burned down in 1889 and rebuilt, the temple interior was repainted to look brand new for the 2008 Beijing Olympics.