Peter I of Sicily was a king who ruled from 1130 to 1139. He was the first monarch of the Kingdom of Sicily, which was established after the Norman conquest of the island. Peter was known for his efforts to consolidate power and strengthen the kingdom, promoting trade and agriculture. During his reign, Peter faced challenges from rival factions and external threats. He worked to maintain stability and protect his realm, but his rule was marked by conflicts with the Byzantine Empire and local nobility. His reign laid the groundwork for future Sicilian kings and the development of the island's unique culture.