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 (ĭm′pə-rä′tôr′, -tər)
1. An army commander in the Roman Republic.
2. The supreme power of the Roman emperor.
3. The head of state and supreme commander in the Roman Empire, in whose name all victories were won.

[Latin imperātōr; see emperor.]

im·per′a·to′ri·al (ĭm-pĕr′ə-tôr′ē-əl) adj.
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Caesar Divi filius: his second imperatorial acclamation and the evolution of an allegedly "exorbitant" name.' Athenaeum 86:419-437.
In summary, Ming Tombs Reservoir has an image mixed with imperatorial mystery and revolutionary worship, combining natural scenery with human creation.