Tree of Knowledge

The Tree of Knowledge is a 5,000 year old gigantic library tree surrounded by houses. It is located in Ohara island, which is currently a burnt land. When the World Government sent a Buster Call to destroy Ohara, the tree fell and crushed almost every historian. The tree is mostly used by Archaeologists who are able to read the Ancient Language. It is here where Nico Robin learned how to read this language.