Lotte World Tower, is a 123-story, 555 m supertall skyscraper, located in Sincheon-dong, Songpa-gu, Seoul, South Korea. It is the sixth-tallest building in the world, the tallest in OECD countries, and also the first in South Korea to be over 100 stories tall. It was the fifth-tallest in the world when completed in 2016, though it was surpassed by the 599 m supertall building, Ping An Finance Center in Shenzhen, China, which opened on March 28, 2017.