James IV of Aragon was a king who ruled from 1285 to 1327. He was the son of Peter III of Aragon and Constance of Sicily. His reign is noted for efforts to strengthen the Crown of Aragon and expand its territories, particularly through military campaigns and strategic marriages. During his rule, James IV focused on consolidating power and promoting trade. He also worked to improve relations with neighboring kingdoms, which helped to enhance the political stability of his realm. His legacy includes contributions to the cultural and economic development of Aragon.