The Zähringen dynasty was a noble family that originated in the 11th century in what is now southwestern Germany. They played a significant role in the development of the region, particularly in the areas around Baden and Fribourg. The dynasty is known for founding several cities, including Bern and Freiburg im Breisgau, which became important centers of trade and culture. The Zähringen family produced several influential rulers, including Duke Berthold IV, who expanded their territories and strengthened their power. The dynasty's influence began to decline in the late 12th century, leading to its eventual extinction in the early 13th century. Despite this, their legacy remains evident in the cities and institutions they established.