Ravensburg is a town in Upper Swabia in Southern Germany, capital of the district of Ravensburg, Baden-Württemberg. Ravensburg was first mentioned in 1088. In the Middle Ages, it was an Imperial Free City and an important trading centre. The "Great Ravensburg Trading Society" (Große Ravensburger Handelsgesellschaft) owned shops and trading companies all over Europe. The historic town centre is still very much intact, including three town gates and over 10 towers of the medieval fortification. "The all-white Mehlsack (Flour Sacks) is a tower marking the Altstadt’s southern edge. A steep staircase leads up to the Veitsburg, a quaint baroque castle." The town's most popular festival is the "Rutenfest" in mid year.