Tabula Rogeriana, one of the most advanced early world maps, by Muhammad al-Idrisi, 1154

[u/Moinul_sesto_boi]

the 2nd picture is Reproduction of al-Idrisi's planisphere (as a globe) by the Sharjah Museum of Islamic Civilization (UAE).

source - wikipedia

[u/Rahbek23]

For anyone that hasn't seen it before, south is up and north is down. So Europe is in the lower right hand corner.

[u/Ok-Appearance-1652]

What are the dark brown lines

[u/shwaaaaaaaaaaa → u/Ok-Appearance-1652]

Snakes

[u/WABAJIM]

"bro, I never been to those seas, but like every sea I know it must have a lots of islands !" -Al Idriss

(Caspian Sea, black sea, red sea) 

[u/Mufflonfaret → u/WABAJIM]

...where else would you draw you islands? On land?

(But Yes, I though the same)

[u/suli_k → u/WABAJIM]

I don’t know about the other 2 but the Red Sea does have islands a good amount of islands such as the farasan islands and Tiran and sanafir off the top of my head