Frederick II of Sweden, also known as Frederick I, was born on May 23, 1676, and ruled as King of Sweden from 1720 until his death in 1751. He was the son of Duke Charles of Södermanland and Princess Ulrika Eleonora of Sweden. His reign was marked by a focus on peace and stability following the Great Northern War, which had left Sweden weakened. Frederick II was known for his efforts to modernize the Swedish economy and promote trade. He supported the arts and sciences, contributing to the cultural development of Sweden during his time. His rule is often seen as a period of relative calm and consolidation for the nation.