A lot has happened in Kassel over the years. For one, the city was arguably the most important place of work of the Brothers Grimm. "The years in Kassel were the happiest of our lives," wrote Jacob Grimm in 1860. The now-immortal "Children's and Household Tales" were published between 1812 and 1815 and are now a UNESCO World Document Heritage. There is plenty in the city that bears witness to the works of the famous brothers, including the house they lived in, the exterior of which is especially well preserved, and the Brothers Grimm Museum. The city in northern Hessen also offers magnificent outdoor spaces, including Bergpark Wilhelmshöhe, one of the largest parks of its kind in Europe and home to the famous classical Wilhelmshöhe Palace. Staatspark Karlsaue is also worth a visit. Large numbers of events, such as the light and water displays in the Bergpark, and the excellent shopping opportunities make Kassel a city to look forward to.