eagle head sculpture in the temple of heaven, beijing

altar ancient annual architecture artifact beijing building carved central ceremony china chinese city complex cultural design dome door dragon drainage dusk dynasty eagle echo emperor forbidden gabled gate good guardrail hall harvest head heaven heritage imperial layout level lunar marble masterpiece ming mound outlet palace parkland philosophical pillar prayer procession prominent qing rain raining rebellion relic religious renovation robbery roof royal sacrifice sacrificial sculpture square step stone surround symbolic symbolism temple tile tourist unesco vault vermilion wall window wooden world