Joaquim Lobo da Silveira, 7th Count of Oriola was a Portuguese plenipotentiary at the Congress of Vienna in 1815. 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.
- Occupation
- diplomat
- Citizenship
- Kingdom of Portugal
- Born
- May 12, 1772
- Died
- April 27, 1846
