The Seoul Arts Center, also referred to as SAC, is an arts complex in the Seocho-gu district of Seoul, in South Korea. It consists of five main buildings: the Opera House, with three auditoriums; the Music Hall, with two concert halls; the Hangaram Art Museum; the Hangaram Design Museum; and the Seoul Calligraphy Art Museum. The Opera House is built in a shape that resembles the traditional Korean bamboo hat called gat. The center is home to the Korea National Ballet, the Korea National Opera, the , the and the .