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The Marajoara or Marajó culture was an ancient pre-Columbian era culture that flourished on Marajó island at the mouth of the Amazon River in northern Brazil. In a survey, Charles C. Mann suggests the culture appeared to flourish between 800 AD and 1400 AD, based on archeological studies.[1] Researchers have documented that there was human activity at these sites as early as 1000 BC. The culture seems to have persisted into the colonial era.[2]