The Kingdom Tower in Jeddah, Saudi Arabia will be the tallest building in the world at over 1,000 meters tall. Construction began in 2011 with a budget of $1.2 billion and is expected to take 5 years to complete. It will feature luxury residential and commercial spaces, including a Four Seasons hotel and observatory. Once finished, the Kingdom Tower will be over 173 meters taller than the current tallest building, the Burj Khalifa in Dubai.