*[http://www.tertullian.org Christian Latin writer Tertullian and his writings] - Public Domain.
*[http://cnx.org./content/m11944/latest History of the Spanish Inqusition] - Creative Commons.
*[http://en.wikisource.org/wiki/Category:Ancient_Christian_works Wikisource:Category:Ancient_Christian_works] - GFDL and Creative Commons.
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# - Content can be used with permission and attribution.
[[Category:Free content]]