World Trade Center Seoul (WTC Seoul) , commonly known as the COEX, is a building complex centered around the COEX Convention & Exhibition Center on Teheranno in Samseong-dong, Gangnam-gu district of Seoul.

It contains the ASEM Tower, the Trade Tower, and the COEX InterContinental Seoul.
The 54-story building Trade Tower was built in 1988 with a height of 228 meters (748 feet), and is one of the tallest buildings in South Korea.
The 836-meter (914-yard) section of sidewalk along Yeongdong Boulevard from exit No.5 of Samseong Station on Seoul Subway Line 2, outside Convention & Exhibition Center and ASEM Tower is designated as a smoke-free zone by the Seoul Metropolitan Government.