What is the oldest building in South Korea?

The oldest building in South Korea is Seokgatap, a stone pagoda located in the Bulguksa Temple in Gyeongju. Seokgatap was built in 751 during the Unified Silla period, and is considered one of the most important pieces of Korean Buddhist architecture. The pagoda is made of granite and consists of nine stories, each with a different design and decoration. Seokgatap is designated as a National Treasure of South Korea and is one of the most popular tourist destinations in the country.