한국의 국교는 무엇인가요?
Prior to the introduction of Buddhism, all Koreans believed in their indigenous religion socially guided by "mu" (shamans). Buddhism was introduced from the Chinese Former Qin state in 372 to the northern Korean state of Goguryeo and developed into distinctive Korean forms. At that time, the peninsula was divided into three kingdoms: the aforementioned Goguryeo in the north, Baekje in the southwest, and Silla in the southeast. Buddhism reached Silla only in the 5th century, but it was made the state religion only in that kingdom in the year 552. Buddhism became much more popular in Silla and even in Baekje (both areas now part of modern South Korea), while in Goguryeo the Korean indigenous religion remained dominant. In the following unified state of Goryeo (918–1392) Buddhism flourished, and even became a political force.
mu