The Duke of Osuna was a title in the Spanish nobility, historically associated with the region of Osuna in Andalusia. The title was first granted in the early 16th century and became prominent during the Spanish Golden Age. The dukes were known for their influence in politics and culture, often supporting the arts and architecture. One of the most notable holders of the title was Pedro Téllez-Girón, the 9th Duke of Osuna, who lived in the 17th century. He was a significant patron of the arts and played a crucial role in the development of Spanish Baroque culture. The title has since passed through various noble families, maintaining its historical significance.