The Adventures of Tintin beginning in 2006 with "Tintin". It was a set of six different euro coins honouring Hergé: three 1½-euro silver coins featuring Tintin and the Professor, Tintin and Captain Haddock, and Tintin and Chang; a €10 (gold) featuring Tintin; and a €20 (silver) and a €50 (gold) featuring Tintin and Snowy. In 2007, on Hergé's centenary, Belgium issued its €20 (silver) Hergé/Tintin coin. During Hergé's lifetime, parodies were produced of the "Adventures of Tintin", with one of the earliest appearing in Belgian newspaper "La Patrie" after the liberation of the country from Nazi German occupation in September 1944. Entitled (""Tintin in
Tintin (character) from his stories." It is this sense of humour that makes the appeal of Tintin truly international. "The Adventures of Tintin" was one of the most popular European comics of the 20th century, and it remains popular today. By the time of the centenary of Hergé's birth in 2007, "Tintin" had been published in more than 70 languages with sales of more than 200 million copies. The study of Tintin has become the life work of many literary critics, observers sometimes referring to this study as "Tintinology". A prominent literary critic of Tintin is Philippe Goddin, "Belgium's leading authority on