Over the last 150 years, this museum has never stopped developing, and today, it is the biggest in the region and the only one of its kind. Visitors step into a weird and wonderful world, where the beauty, complexity and diversity of the living world is on show. The collections draw your attention to the fragility of ecological balance and the problem of extinction in the animal kingdom. Skeletons of whales and other mammals float above your head, hanging from the ceiling, while on the ground, dioramas demonstrate the animal life of our forests, marshes, coasts and fields. In other rooms, you'll find mammals, and the birds of all European species as well as multi-coloured exotic ones; as well as insects, amphibians, snakes, fish, etc. 400 million years of evolution are brought to life here, in an audio-assisted tour that explains what shaped the local landscapes, and how the region became a land of coal. The museum puts on two temporary exhibitions per year.