Hànwǔdì xiūjiàn de Jiànzhāng Gōng hàochēng qiānmén-wànhù.
The Jianzhang Palace built by Emperor Wu of Han was said to have a thousand gates and ten thousand doors.
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Best known from 王安石's New Year poem 元日: 千门万户曈曈日, 'on a thousand gates, the bright new sun'. The 史记 had used it earlier of the Jianzhang Palace and its countless gates.