Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Inquisition
Article provides a detailed introduction to the inquisition as a legal proceeding rather than the Spanish relgio-secular institutional body that the word more often brings to mind.
University of Missouri
Famous Trials: The Trial of Galileo
An account of the trial of Galileo, who was brought before the Roman Inquisition in the early 1600s.
University of Notre Dame
Notre Dame: The Inquisition Collection
This collection of more than 500 original documents from the Spanish Inquisition features the Holy Offices Manual of Instructions and the Index of Banned Books. The introductory information and notes are in English.
Rice University
Galileo Project: Inquisition
The Galileo Project provides a broad overview of the Inquisition, a legal institution in the Catholic Church charged with the eradication of heresies.
Rice University
Galileo Project: Procedure of the Roman Inquisition
This site from The Galileo Project of Rice University provides a medium length article describing the prosecution of the Roman Inquisition. The information is very interesting and worth checking out on the subject.
Rice University
Galileo Project: Historical Overview of the Inquisition
This article defines an inquisition, which is a legal proceeding of the Catholic Church and not restricted to a particular institution such as the Spanish Inquisition.