The hidden art of rocks: From 9 August, the exhibition „Abbild und Verwandlung“ shows 30 petrographics by Prof. Dr. Michael Raith. The emeritus geoscientist opens up fascinating in-sights into the marvellous microcosm of rocks and minerals. The artistically processed photos taken under the microscope reveal an inspiring mineral world of images featuring a wide varie-ty of colours and shapes. The special exhibition can be visited at the Museum Koenig Bonn until 25 September.