-IndiaAhh. Adding the blue makes all the difference in the world. This appears to be a map of Papal influence / mutual understanding for somewhere in the early 19th century.
Blue are the regions that recognize the total spiritual authority of His Holiness in Avignon.
Maroon are the Copts,Thomasian,Liturgians, and other Christian nations that are considered "In common communion if not common authority" by the Papacy.
Orange are former common communion areas deemed heretics by the Council of Tunis in 1803.
Yellow are the "Crusade Zones" where loyal Catholics are under oppression by heretic kings.
I'm a little surprised that the non-clerical Christian nations in the new world and Hispania are lumped together in grey with the Mohamadeans of Arabia/East Africa and the Zoastrian syncretism of the European Hun states.
-Christian
Really?