Welcome to Yeouido Island in the heart of Seoul. You are standing before the Yoido Full Gospel Church, a landmark that is much more than just a religious building; it is a global phenomenon. As you look at the massive structure located on Yeouiseo-ro, you are viewing the home of what was recognized in nineteen ninety-three by the Guinness Book of World Records as the single largest Christian congregation in the world. Today, this church serves a registered membership that has reached as high as eight hundred eighty thousand people. Take a moment to orient yourself. To the west, the Han River flows past, and just nearby sits the National Assembly of South Korea. This location once felt remote on an island often flooded by the river, but today it is the epicenter of both Korean finance and faith. As the sounds of the city hum around you, prepare to step into a story of incredible growth that matches the rapid rise of modern South Korea itself.