I'm guessing OP is referring to the Piri Reis map and the various claims around the identity of its "Southern Continent": https://en.wikipedia.org/wiki/Piri_Rei

I'm guessing OP is referring to the Piri Reis map and the various claims around the identity of its "Southern Continent": https://en.wikipedia.org/wiki/Piri_Reis_map https://en.wikipedia.org/wiki/Piri_Reis_map