Lousberg

At 264 meters, the Lousberg is a prominent elevation on the northern edge of the historic center of Aachen, which was laid out as a forest and mountain park at the beginning of the 19th century according to plans by Maximilian Friedrich Weyhe. The origin of the name is not entirely clear. It could come from lousen, since the mountain offers an excellent panoramic view, or it could be traced back to Louis the Pious, the son of Charlemagne. Another explanation has to do with the Aachen dialect term lous, which means "clever".

Source: Wikipedia