alternatehistory.com

So here I present you the map of the known world by 1200 AD. It may not be complete and may lack a few details here and there, but here it is:
View attachment 515403
In terms of geographical extent, perhaps the largest realms are:

• The Rhomaic Empire
• Cumania
• Jurchen (Jin) Dynasty of Northern China
• Dynasty of Song
• Mandeshi Dynasty of India