Deep Rooted Tree is a 2011 South Korean television series starring Han Suk-kyu, Jang Hyuk and Shin Se-kyung. Based on the novel of the same name by Lee Jung-myung, it aired on SBS from 5 October to 22 December 2011 on Wednesdays and Thursdays at 21:55 for 24 episodes.

Sejong, personal name Yi Do, commonly known as Sejong the Great, was the fourth monarch of the Joseon dynasty of Korea. Today, he is regarded as one of the greatest rulers in Korean history, and is remembered as the inventor of Hangul, the native alphabet of the Korean language.