King Frederik X of Denmark was born on March 26, 1920, and became the king in 1972. He was the son of King Frederik IX and Queen Ingrid. His reign was marked by a commitment to modernizing the Danish monarchy and promoting social welfare in Denmark. Frederik X was known for his interest in sports and the arts, often participating in various cultural events. He was married to Queen Ingrid, and they had three daughters. His legacy includes a strong connection with the Danish people and a focus on maintaining the monarchy's relevance in contemporary society.