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Which ancient civilization was centred in Bahrain around 2000 BCE?

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The ancient civilization centered on Bahrain around 2000 BCE was Dilmun.

Dilmun was a prosperous independent kingdom and a vital commercial hub that served as a transshipment point for trade between Sumer and the Indus Valley. The island's historical prominence during this era is evidenced by extensive archaeological remains, including thousands of burial mounds and the site of Qal'at al-Bahrain, which has been designated a UNESCO World Heritage site.123