The World Tree, also known as the Royal Palace, is the tree that grew from the Heartseed in Ayani's grave. It is a palace and the home of Queen Valerian . It is found directly in the middle of the atlas, that is, in the middle of Sanctuary, signifying it is an important landmark. The tree's appearance is similar to the one Princess Lavender lives in (Briarheart Palace), but with a different color scheme. This is because Briarheart Palace grew out of the Heartseed half that Lavender tore off before she was exiled.