Asterix at 50

Asterix's co-creators Albert Uderzo (left) and René Goscinny with an early drawing of Obelix and Asterix. Photograph: Les Éditions Albert René / Goscinny-Uderzo

Albert Uderzo, now 82, meets the press at the exhibition's opening. Photograph: Graham Marks

Uderzo, posing next to cartoon sketches at the Musée de Cluny, has continued to create fresh adventures for Asterix since the death of Goscinny in 1977. Photograph: Bertrand Guay/AFP/Getty Images

A visitor to the exhibition looks at an Asterix comic. The books have now sold 325m copies in 107 countries. Photograph: Ian Langsdon/EPA

A sketch from the very first story, Asterix le Gaulois (Asterix the Gaul). The story was initially serialised in Pilote, a comic founded by Goscinny and a few other graphic artists. It was published in book form in 1961. Photograph: Les Éditions Albert René / Goscinny-Uderzo

Two sketched frames from Asterix Gladiateur (Asterix the Gladiator) published in 1964. The story sees Obelix use his famous catchphrase, "Those Romans are crazy" for the first time. Photograph: Les Éditions Albert René / Goscinny-Uderzo

A sketch for the cover of Asterix et Latraviata (Asterix and the Actress), published in 2001, and featuring the first ever appearance by Asterix and Obelix's parents. Photograph: Les Éditions Albert René / Goscinny-Uderzo

The exhibition, Astérix au musée de Cluny, continues until 3 January 2010. Photograph: Ian Langsdon/EPA

Asterix from 'Asterix And The Big Fight (1989) Photograph: Cinetext/Gaumont/Allstar

Asterix, Obelix and Idefix from the 1967 film Asterix the Gaul. Photograph: Cinetext/Belvision/Allstar