Buildings and structures completed in the 3rd millennium BC
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Buildings and structures completed in the 30th century BC
Buildings and structures completed in the 29th century BC
Buildings and structures completed in the 28th century BC
Buildings and structures completed in the 27th century BC
Buildings and structures completed in the 26th century BC
Buildings and structures completed in the 25th century BC
Buildings and structures completed in the 24th century BC
Buildings and structures completed in the 23rd century BC
Buildings and structures completed in the 22nd century BC
Buildings and structures completed in the 21st century BC