La famille de Momo a construit les ponêglyphes 
Chapter title: Inside Whale
Cover story: Baltigo
Sabo, Koala and Dragon are watching bounty poster(s)
Whale Forest is sacred because of the red Poneglyph. It is called "Lord Poneglyph", which can lead people to Raftel. There are 4 Lord Poneglyphs. Each one indicates a spot somewhere other than Raftel. If people connect lines among those spots, the whereabouts of Raftel is supposed to be revealed.
Luffy is excited and says he will bring back Sanji soon.
Kaidou and Big Mom have Lord Poneglyphs, but nobody knows where the last Lord Poneglyph is located.
Nekomamushi says there is no need to snatch Lord Poneglyphs from Yonkou and suggests to secretly collect the copies.
Kouzuki clan are stone masons for a very long time. They made Poneglyphs. How to read/write the Poneglyphs has been handed down from generation to generation until Momonosuke's father was executed by Kaidou and Shogun of Wano.
According to Kanjuro, Oden Kouzuki is Roger's crewmate.