Frederick I of Sweden was a king who reigned from 1720 to 1751. Born on October 23, 1676, he was the son of Duke Charles of Södermanland and Princess Ulrika Eleonora of Sweden. Frederick became king after the death of Charles XII and was known for his efforts to strengthen the monarchy and improve the economy. During his reign, Frederick I focused on cultural development and the arts, promoting the influence of French culture in Sweden. He was married to Ulrika Eleonora, who played a significant role in his court. Frederick's reign is often seen as a period of relative peace and stability in Swedish history.