Born to the nobility, the son of Marco Ottoboni, Chancellor of the Republic of Venice.
Earned a doctorate in civil and canon law from the University of Padua.
Governor of Terni, Rieti, and Spoleto.
Auditor of the Vatican Rota for 14 years.
Created cardinal on 19 February1652 by PopeInnocent X.
Bishop of Brescia.
Cardinal-datary.
241st pope in 1689.
King Louis XIV restored Avignon to him.
Voided the Declaration of Gallican Liberties.
Subsidized Venice's conflict with the Turks.
Enlarged the Vatican Library.