Openair Frauenfeld is an annual Hip Hop music festival that takes place in Frauenfeld and is considered to be the largest Openair festival in Switzerland and the largest Hip Hop music festival in Europe. It was created in 1985 and has now taken place for 14 times. The event was originally hosted under the name "Out in the Green Festival" until it was changed to "Openair Frauenfeld" in 2007. Since then it has hosted numerous high profile celebrities and has attracted an annual turnout of around 150'000 people.