During the Three Kingdoms of Korea period, the province was the center of Mahan, and Mahan became part of Baekje, one of the three Kingdoms. In the Unified Silla period, the towns of Wansan-ju (now Jeonju) and Namwon-gyeong (now Namwon) were started in the province. When King Seongjong of Goryeo divided the whole country into 10 "do"s, Jeolla-do was called Gangnam-do. Later, in the Joseon Dynasty, it was finally called Jeolla-do.