The Holocaust History Project (THHP) is an inactive non-profit corporation based in San Antonio, Texas. Its archived website offers a comprehensive selection of documents, recordings, photographs, and essays regarding the Holocaust, Holocaust denial, and antisemitism. The project became known for its refutations of the Leuchter report and the Rudolf report. Since then, it has assisted the defense in the case of Irving v. Lipstadt. As of 2016, THHP website is no longer available online but all of its contents are accessible via several hundred captures in the Internet Archive. However starting April 2016 the French NGO and project phdn.org has put back online an almost complete copy of the original THHP website.