Treaty of the Mapuá
| Signed | August 27, 1659 |
|---|---|
| Location | Mapuá River, Marajó Archipelago |
| Expiration | 1661 (de facto) |
| Parties |
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| Language | Portuguese |
The Treaty of the Mapuá (Portuguese: Tratado do Mapuá) was signed in August 1659 by Portuguese Jesuits led by António Vieira with various indigenous peoples who inhabited the Marajó Archipelago at the mouth of the Amazon River.