Burkhardt, J. Abschied vom Religionskrieg, 1985 p. 144, etc. (Klemens XIII; Carlo Rezzonico, pope 1758-1768)
Catholic hierarchy [electronic resource], June 30, 2009 (Carlo della Torre Rezzonico; 1693-1769; appointed bishop of Padua in 1743 until 1758 when he was elected Pope Clement XIII)
Diz. biogr. degli italiani (Clemente XIII; Pope)
Encyc. Amer. (Clement XIII; b. 1693; d. 1769; pope 1758-1769)
Encyc. Brit. (Clement XIII; b. Carlo della Torre Rezzonico; b. 3/7/1693; d. 2/2/1769)
Pastoral letters issued by Carlo della Torre Rezzonico, Bishop of Padua, later Pope Clement XIII, 1743-1749