Yeonsangun of Joseon

Yeonsangun or Prince Yeonsan, personal name Yi Yung, was the 10th monarch of Joseon. Often considered the worst tyrant in Joseon's history and perhaps all Korean history, he is notorious for launching two bloody purges, seizing hundreds of women from all over the peninsula to serve as palace entertainers, and appropriating Sungkyunkwan as a personal pleasure ground. Yeonsangun's despotic rule provided a stark contrast to the liberal era of his father, and as a much-despised overthrown king, he did not receive a temple name.