Heidelberg Catechism (Subscribe)
Links
The Heidelberg Catechism
http://www.reformed.org/documents/heidelberg_intro.html
A short history of the Catechism.
Olevianus & Ursinus
http://www.victorshepherd.on.ca/Heritage/Olevianus%20and%20Ursinus.htm
Short biographies of the authors of the Heidelberg Catechism.