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Joaquim Lobo da Silveira, 7th Count of Oriola
Portuguese plenipotentiary at the Congress of Vienna / From Wikipedia, the free encyclopedia
Joaquim Lobo da Silveira, 7th Count of Oriola (May 12, 1772 – April 27, 1846) was a Portuguese plenipotentiary at the Congress of Vienna in 1815.[1][2] While at the Congress he signed a number of treaties and documents on behalf of Prince-Regent John of Portugal including the Declaration of the Powers, on the Abolition of the Slave Trade, on 8 February 1815.[2]
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Later he acquired land in Prussia and settled there becoming a naturalised citizen of Prussia. The King of Prussia granted him the title of graf (the German equivalent to his Portuguese title of conde (count)).[1]