Famous forgeries are artworks or documents that have been intentionally created to deceive others into believing they are genuine. Some of the most notorious forgeries include paintings attributed to Vincent van Gogh and Pablo Picasso, which were produced by skilled artists who aimed to replicate their styles. These forgeries can significantly impact the art market and the reputations of collectors and institutions. One of the most infamous cases is the Hitler Diaries, which were published in the 1980s but later revealed to be fakes. Such forgeries highlight the challenges in authenticating valuable items and the lengths to which individuals will go to profit from deception.