Borromeo, Carlo
- Biographical article on the churchman, in the 1911 Encyclopædia Britannica.
- http://www.1911encyclopedia.org/Carlo_Borromeo

Catholic Online: St. Charles Borromeo
- Biographical portrait.
- http://www.catholic.org/saints/saint.php?saint_id=212

For All the Saints: Charles Borromeo
- Illustrated biography.
- http://www.saintpatrickdc.org/ss/1104.htm#char

Charles Borromeo, Saint
- Short entry in the Columbia Encyclopedia.
- http://www.bartleby.com/65/ch/CharlesB.html

Saint Charles Borromeo, Archbishop, Cardinal
- From the book "Lives of Saints," published by John J. Crawley.
- http://www.ewtn.com/library/MARY/CHARLES.htm

St Charles Borromeo, Cardinal, Archbishop of Milan, and Confessor
- Long article from Alban Butler's Lives of the Saints.
- http://www.ewtn.com/library/MARY/BORROMEO.htm

Catholic Encyclopedia: St. Charles Borromeo
- Biographical article on the Archbishop of Milan, Cardinal, a leading light of the Catholic Reformation.
- http://www.newadvent.org/cathen/03619a.htm

Charles Borromeo, 1538-1584
- Biographical essay.
- http://www.cin.org/chaborro.html

Patron Saints Index: Charles Borromeo
- Illustrated profile.
- http://www.catholic-forum.com/saints/saintc10.htm

Editae Saepe
- On St. Charles Borromeo. Encyclical of Pope Pius X, promulgated in 1910.
- http://www.catholic-forum.com/saints/stc10001.htm