With the opening of the 6th National Assembly, the issue of building the National Assembly building was re-discussed in earnest, and the plan was to secure 100,000 pyeong of land in Yeouido and build the National Assembly building gradually according to the demand for the unification of the two Koreas.
Construction began on the meaningful Constitution Day on July 17, 1969, and completed the main building of the National Assembly building (24,636 pyeong) on August 15, 1975, six years later, and moved from the National Assembly building in Taepyeong-ro on September 2, that year.
The Capitol covers one-eighth of Yeouido's total area. And the National Assembly building, a reinforced concrete building in the center, is one basement floor and seven ground floors, 122 meters long and 81 meters wide, making it the largest of its kind in the East.
At the top of the Capitol is a huge dome with a base of 64 meters and a weight of 1,000 tons. The dome is dedicated to twenty-four octagonal pillars, with twenty-four footnotes representing the twenty-four solar terms and eight pillars at the front representing eight degrees nationwide.