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Events in the year 1641 in Portugal.
Incumbents
Events
- March 27 - beginning of the 11 month Siege of São Filipe near Angra do Heroismo in the Azores
- June 12 - Treaty of The Hague (1641) is signed in The Hague representatives of the States-General of the Netherlands and by the ambassador of the Kingdom of Portugal
- November 18 - John IV ratifies the treaty of The Hague
