Count Berthold of Zähringen was a prominent nobleman in the 11th century, known for his role in the expansion of the Zähringen dynasty. He played a significant part in the political landscape of Swabia and Baden, establishing important alliances and contributing to the development of several towns, including Freiburg. Berthold was also involved in the founding of monasteries, which helped promote religious and cultural growth in the region. His legacy includes the strengthening of local governance and the promotion of trade, which laid the groundwork for future economic development in southern Germany.