Duke Berthold V was a prominent nobleman from the House of Zähringen, ruling as the Duke of Swabia in the late 11th century. He was born around 1050 and became known for his political influence and military leadership during a time of significant conflict in the region. His reign was marked by efforts to consolidate power and manage the complexities of feudal allegiances. Berthold V was also involved in the broader struggles of the Holy Roman Empire, particularly during the Investiture Controversy, which pitted secular rulers against the authority of the Pope. His legacy includes contributions to the development of the Duchy of Swabia and the intricate relationships among European nobility during his time.