The North Tower was completed in 1970 standing at 1368 feet tall and the South Tower was completed in 1973 clocking in at 1362 feet tall, making them the tallest buildings in the world until the Sears Tower was completed in 1974.
Kulla Veriore mbaroj së ndërtuari në vitin 1970, dhe qendronte 423 metra lartë, kurse Kulla Jugore në vitin 1973, me 416 metra lartë, duke i bërë ato ndërtesat më të larta në botë derisa u ndërtua Kulla Sirs në vitin 1974.