[mlmonkey]

I wish it was an actual interactive map instead of a video, as it raises so many questions.

Where did Christianity come from in Tibet? If I'm reading it correctly, around 1100AD there seems to be a large number of Christians near Lhasa. And then around 1266 a majority Christian region around (I think) Mongolia suddenly gets wiped out.

[jltsiren]

The short version is that the internal politics of the Mongol Empire shuffled the religious map of Asia.

Christianity gradually spread further into Asia, but the rise of Islam severed the contact between the Church of the East and Western Christianity. Mongols had their own shamanistic religion, but many of their tribes had also become Christian, Muslim, or Buddhist. The Mongol Empire tolerated most religions, and individual leaders often favored one religion or another. When the empire fragmented, three of the major khanates chose Islam and the fourth chose Buddhism, while Christianity largely faded away in the Asian parts of the empire.

[craftkiller]

If they made it interactive, it would be nice to be able to toggle various layers. For example, I was watching it thinking "It's odd that nestorianism is drifting away from the rest" until I realized that empty void in the middle was Islam. It'd be nice if they also had other religions like Islam mapped, and let us toggle which ones we want to see so it doesn't become too noisy.