The House of Hauteville was a noble family that originated in the 11th century in Normandy, France. They are best known for their role in the conquest of Southern Italy and Sicily, where they established a powerful dynasty. The family produced several notable rulers, including Roger I of Sicily, who became the first Count of Sicily. The Hauteville family played a significant part in the political and cultural development of the region. Their legacy includes the establishment of the Kingdom of Sicily and contributions to the blending of Norman, Arab, and Byzantine influences in the area.