Poneglyph of Shandora

The Poneglyph of Shandora is located in Skypiea. Robin discovered that each location of the Poneglyphs held not one but two Poneglyphs. The first Poneglyph has a message to finding the second Poneglyph, while the second Poneglyph held the message of the lost century. Skypiea's fake poneglyph was located in a set of ruins Robin found in Upper Yard. Skypiea's true Poneglyph was located on its Sacred Bell and it revealed to Robin another dark secret -this poneglyph spoke of how to locate yet another weapon, Poseidon. Gol D. Roger had also previously read this Poneglyph and left a message encouraging anyone who could read the Poneglyphs to continue searching for the lost history. The Shandians were left to guard the Poneglyph but over time as events in Skypiea played out they forgot about its existence.