It's called Kingdom Tower and will be located in Jeddah, Saudi Arabia, near the Red Sea.
The architecture firm provided artist renderings of the project.
The proposed tower will be more than 1,000 meters, or 3,300 feet tall. That means it will be more than twice the height of the Willis Tower.
Kingdom Tower will feature a Four Seasons Hotel office space and luxury condominiums.
There is no word on when it will be completed.