The palace survived until the Tang dynasty when it was burned down by marauding invaders en route to the Tang capital Chang'an. This was the largest palace ever built on Earth,[1] covering 4.8 km2 (1,200 acres), which is 6.7 times the size of the current Forbidden City, or 11 times the size of the Vatican City.[2] Today, little remains of the former palace. The site of the palace, along with many other sites along the eastern section of the Silk Road, was named a UNESCOWorld Heritage Site in 2014.