Jongmyo
The Jongmyo Shrine holds spirit tablets, each dedicated to a specific king or queen from the Joseon Dynasty.  The Confucian way of life includes ancestor worship.  During the Joseon Dynasty, the king of Korea would go to Jongmyo to pray to earlier kings and queens.  There were also larger rites, with more people.  Some of them involved singing and dancing.  Some of these rites are still performed in modern times.