The Plane Tree of Hippocrates is located opposite the entrance of the Castle of Neratzia and the Gazzi Hassan mosque. According to legend Hippocrates used to teach under the shade of the tree.The current tree is only about 500 years old, but may possibly be a descendant of the original tree which allegedly stood there 2400 years ago, in Hippocrates' time. The tree has become hollowed out over the years, and some branches are supported by metal scaffolding. Next to the tree is a water source with engravings in Arabic, also built by the Turkish Governor Gazi Hassan. Many medical colleges and schools across the world have or claim to have pieces of the original tree or trees seeded from it.
