// todo need optimize like in event.jsp. Add indexing or not indexing this page. Nagada I / Amratiense (apr 21, 4000 BC – jan 21, 3600 BC) (Timeline)
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Nagada I / Amratiense (apr 21, 4000 BC – jan 21, 3600 BC)

Added to timeline:

Date:

apr 21, 4000 BC
jan 21, 3600 BC
~ 400 years