Encyclopædia Britannica: Campanella, Tommaso
- Biographical entry from the 1911 edition. With bibliography. Some scanner errors.
- http://www.1911encyclopedia.org/Tommaso_Campanella

Catalog of the Scientific Community: Campanella, Tommaso
- Basic biographical facts, compiled by the Galileo Project.
- http://galileo.rice.edu/sci/campanella.html

Wikipedia: Tommaso Campanella
- Biography of the Renaissance thinker, hyperlinked to related topics.
- http://en.wikipedia.org/wiki/Tommaso_Campanella

Columbia Encyclopedia: Campanella, Tommaso
- Brief biographical entry.
- http://www.bartleby.com/65/ca/Campanel.html

Catholic Encyclopedia: Tommaso Campanella
- In-depth article on the strange career of the Italian anti-Aristotelian Dominican writer.
- http://www.newadvent.org/cathen/03221b.htm

Biography.com: Campanella, Tommaso
- Very short outline of this scholar's life.
- http://www.biography.com/search/article.jsp?aid=9236181&search=

Readings in Modern Philosophy: Tommaso Campanella
- Links to various resources on this thinker, and an online excerpt from Weber's History of Philosophy.
- http://www.class.uidaho.edu/mickelsen/Campanella.htm

The Philosophy of Tommaso Campanella
- Article from the Radical Academy, concisely reviewing Campanella's philosophical, religious and political teachings.
- http://www.radicalacademy.com/philcampanella.htm