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In page Temple of Heaven:

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The temple was occupied by the Anglo-French alliance during the Second Opium War.[1] In 1900, during the Boxer Rebellion, the Eight-Nation Alliance occupied the temple complex and turned it into the force's temporary command in Peking, which lasted for one year.[1] With the downfall of the Qing, the temple complex was left un-managed. The neglect of the temple complex led to the collapse of several halls in the following years.[citation needed]