Ohara Poneglyph

The Ohara Poneglyph was located on the now destroied Island of Ohara. This poneglyph includes information about the Lost Century--among other things, it includes the name of the lost civilization, though it has yet to be said what the name is. The World Government considered the archaeologists studying it dangerous and used the Buster Call to destroy the island, Nico Robin being the sole survivor.