A Wikipedia article describing a World War II Nazi death camp in Warsaw in which large numbers of Poles were gassed was full of falsehoods and may have been the online encyclopedia’s most enduring hoax before it was rewritten last Summer.
The false Wikipedia article on the “Warsaw Concentration Camp” said the facility contained gas chambers and that 200,000 people died there. Both claims are unfounded, yet they remained on the English-language Wikipedia page for most of the last 15 years.
The erroneous article was translated into a dozen other languages and the false claims made their way into other Wikipedia articles, garnering over 500,000 views in English.
