This international sandstone symposium will take place in Vianden (Luxembourg) in May 2005 and follows the sandstone symposium that took place in Doubice (CZ) in September 2002.

The idea was brought to Luxembourg by a participant to the Czech symposium. The "Groupe d'études ayant pour objet la conservation du patrimoine naturel de la Petite-Suisse luxembourgeoise", an advisory group created by the Luxembourg Government to promote the conservation of remarkable natural sites in the Luxembourg sandstone area, the Mullerthal, also known as the "Petite-Suisse luxembourgeoise", launched the idea to organize the next sandstone symposium in Luxembourg.

Organizing institutions

• Administration des eaux et forêts
• Musée national d'histoire naturelle (M.N.H.N.)
• Musée national d'histoire et d'art (M.N.H.A.)
• Société des naturalistes luxembourgeois (S.N.L.)

Partner organizations

• A.G.L. - Association des géologues luxembourgeois (Luxembourg geologists association)
• A.G.M.P. - Amis de la géologie, de la minéraolgie et de la paléontologie du Luxembourg (Friends of geology, mineralogy and paleonthology in Luxembourg)
• H.F.N. - Fondation Hëllef fir d'Natur (Help for nature foundation)
• LAG LEADER+ Mullerthal - Local action group Leader +
• NATURA - Ligue luxembourgeoise pour la protection de la nature et de l'environnement (Luxembourg league for the environment and nature conservancy)
• Naturerkundungsstation Teufelsschlucht (Nature visitor center)
• Oeko-fonds - Foundation Oeko-fonds
• S.G.L. - Service géologique du Luxembourg (Geological survey of Luxembourg)
• S.P.L. - Société préhistorique luxembourgeoise (Luxembourg prehistorical society)