and Wilhelm Grimm spent more than 30 years of their lives to collect and compile the Grimm's Fairy Tales (German: Grimms Märchen) collection. Kassel is also the city of "documenta" where the world's largest exhibition of contemporary art takes place every five years. In 1971, Uni Kassel was founded in the city of Kassel as a reform university. The University is one of the first universities to have developed an international and inter-disciplinary perspective in research and learning. Being the youngest public university in the state of Hessen, it has currently a student population of over 25,000 which includes some 3,200 international students from over 120 countries. External links International Winter University, University of Kassel University of Kassel International Study Center, University of Kassel Student Service, University of Kassel DAAD References Education in Hesse Study abroad programs Environmental education Engineering universities and colleges in Germany History education Summer schools