King Olav II of Norway, also known as Olav the Holy, was a significant figure in Norwegian history. He reigned from 1015 to 1028 and is best known for his efforts to convert Norway to Christianity. His reign marked the beginning of the Christianization of the country, which had a lasting impact on Norwegian culture and society. After his death in battle in 1030, Olav was canonized as a saint by the Catholic Church. His feast day is celebrated on July 29, and he is considered the patron saint of Norway. His legacy continues to influence Norwegian identity and heritage today.