Map of Byzantine Empire ca 1180, before the 4th Crusade.
This file was derived from:

 Bizancio1081AD.svg: 
Byzantium1180.png:
Bizancio1081AD.svg: *Byzantium1081AD.PNG: User:Bigdaddy1204
derivative work: Rowanwindwhistler
Byzantium1180.png: User:Jniemenmaa
derivative work: Rowanwindwhistler