Yeonsan-gun (23 November 1476 – 20 November 1506, r. 1494–1506), born Yi Yung, was the 10th king of Korea's Joseon Dynasty. He was the eldest son of Seongjong by his second wife, Lady Yoon. He is often considered the worst tyrant in Joseon Dynasty, notorious for launching two bloody purges of the seonbi elite. He also seized a thousand women from the provinces to serve as palace entertainers, and appropriated the Seonggyungwan hall of study as a personal pleasure ground. Because he was overthrown, Yeonsan-gun did not receive a temple name.
Deposed Queen Yoon, formally known as Queen Jeheon, served Prince Yeonsan's father, Seongjong, as a concubine until the death of Queen Gonghye, Seongjong's first wife. With no royal heir, the king was urged by counselors to take a second wife to secure the royal succession. Lady Yoon was chosen for her beauty, and was formally married in 1476. Several months later, she gave birth to her first son, Yi Yung, later to become Prince Yeonsan. The new queen proved to be temperamental and highly jealous of Seongjong's concubines living inside the palace, even poisoning one in 1477. In 1479, she physically struck the king one night, leaving scratch marks. Despite efforts to conceal the injury, Seongjong's mother, Grand Queen Insu, discovered the truth and ordered Lady Yoon, now known as the Deposed Queen Yoon, into exile. After several popular attempts to restore the deposed Queen to her position at court, government officials petitioned that she be poisoned, and she was.
Prince Yeonsan (연산군 - Yeonsan gun) is a 1961 South Korean film directed by Shin Sang-ok. Among several awards including Best Actor and Best Actress, it was chosen as Best Film at the first Grand Bell Awards ceremony.
A historical drama about Yeonsangun of Joseon as a prince trying to restore the status of his mother, the deposed and executed Queen Yun.