The Holocaust History Project (THHP) is an inactive non-profit corporation based in San Antonio, Texas.

[1] However starting April 2016 the French NGO and project phdn.org has put back online an almost complete copy of the original THHP website.

Among the material which is presented, there are essays about scientific and legal analyses, events and people, expert witness testimony, original Nazi documents, transcripts of many of the Nuremberg trials, and the complete texts of two influential works, Jean-Claude Pressac's Auschwitz: Technique and Operation of the Gas Chambers and Robert Jay Lifton's The Nazi Doctors.

More than 20 "short essays" address a variety of questions of interest, including an extensive bibliography of literature about Holocaust related topics.

It also contains a section which is devoted to Holocaust denial, including direct debunking of deniers such as David Irving, Ernst Zündel, and several others.