Korea national treasure No.7 - Stele for the Construction of Bongseonhonggyeongsa Temple, Cheonan

Korea national treasure No.7 -

 Stele for the Construction of Bongseonhonggyeongsa Temple, Cheonan

국보 제7호 - 천안 봉산 흥경사 갈기비

 Images(Source : Cultural heritage administration of Korea)

The cultural essence of lineage noble in Goryeo Period(more)

Korea national treasure No.6 - Seven-story Stone Pagoda in Tappyeong-ri, Chungju

Korea national treasure No.6 - Seven-story Stone Pagoda in Tappyeong-ri, Chungju

국보 제6호 - 충주 탑평리 7층 석탑

Images(Source : Cultural heritage administration of Korea)

This is is the tallest of the extant stone pagodas built in the Unified Silla Period.(more)

Korea national treasure No.5 - Twin Lion Stone Lantern of Beopjusa Temple

Korea national treasure No.5 - Twin Lion Stone Lantern of Beopjusa Temple

국보 제5호 - 법주사 쌍사자 석등

Images(Source : Cultural heritage administration of Korea)

This is the Korea's oldest existing stonework carved with a lion(more)

Korea national treasure No.2 - Ten-story Stone Pagoda of Wongaksa Temple Site

Korea national treasure No.2 - Ten-story Stone Pagoda of Wongaksa Temple Site
국보 제2호 - 원각사지 10층 석탑

Images(Source : Cultural heritage administration of Korea)

The Best Stone Pagoda in early Josen period
more information and pictures(more)

Korea national treasure No.1 - Sungnyemun (Namdaemun)

Korea national treasure No.1 - Sungnyemun (Namdaemun)
국보 제1호 - 숭례문(남대문)

Images(Source : Cultural heritage administration of Korea)

The national treasure No.1 of South Korea is Sungnyemun gate of Seoul as known as Namdaemun 

Sungnyemun Gate was the main south gate of the city wall of Seoul.(more)