Peter I of Aragon was a king who ruled from 1094 to 1104. He is known for his efforts to expand the Kingdom of Aragon and strengthen its influence in the region. His reign was marked by military campaigns against the Moors in Spain, which aimed to reclaim territory and spread Christianity. Peter I was also notable for his role in the Reconquista, a series of campaigns to reclaim Iberian territories from Muslim rule. He established alliances with other Christian kingdoms and worked to consolidate power in Aragon, laying the groundwork for future expansion under his successors.