Editing Yeonsan-gun (section)

==Execution of his mother==
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 stooping to 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.