Beijing Ancient Observatory at 2 Dongbiaobei Hutong in Jianguomen is the historic Ming-Qing imperial observatory museum administered with Beijing Planetarium. Its surviving eight large Qing astronomical instruments, original observatory architecture and Chinese-astronomy exhibition interpret centuries of observation and East-West astronomical exchange. Official visitor information publishes Monday and Wednesday-Sunday 09:00-16:30 access, 16:00 last admission and Tuesday closure except statutory holidays.