That is a question that frequently crops up with Van Gogh paintings. Vincent Van Gogh's work has probably been copied and forged more than that of any other painter of the modern era. Even the origin of some works attributed to Van Gogh hanging in museums is extremely doubtful.New Van Gogh works surface almost daily. With some, it is immediately clear that they are not originals. But there are also numerous convincing forgeries. There is no authoritative directory of Van Gogh's work, and in some cases even experts find it hard to be sure. Van Gogh paintings regularly fetch top prices at auction, so many people dream of making the ultimate discovery at a local flea market or during an attic clearout.