Eric IX of Sweden, also known as Eric the Saint, was a king who ruled Sweden during the 12th century, specifically from around 1156 until his death in 1160. He is often credited with promoting Christianity in Sweden and is considered one of the first Christian kings of the region. His reign was marked by efforts to consolidate power and expand the influence of the church. Eric IX is remembered for his pious nature and dedication to his faith. He was canonized as a saint by the Catholic Church after his death, and his feast day is celebrated on May 18. His legacy includes the establishment of a more organized Christian society in Sweden.