Robert I of Dreux was a French nobleman born around 1216. He was the son of Robert II of Dreux and Hawise of Salisbury. Robert became the Count of Dreux and was known for his role in the political landscape of medieval France. He was involved in various military campaigns and held significant influence in the region. In addition to his military endeavors, Robert I of Dreux was also a patron of the church. He supported the construction of several religious buildings and was known for his piety. His legacy continued through his descendants, who played important roles in the history of France.