 The DFG / LFA Freiburg, a French-German high school established by the 1963 Élysée Treaty, is in the city.Christianity

Freiburg belonged to Austria until 1805 and because of this stayed Catholic, even though surrounding villages like Haslach, Opfingen, Tiengen, and the surrounding land ruled by the Margrave of Baden turned Protestant as a result of the Reformation.The city was part of the Diocese of Konstanz until 1821.