Christianity was only popular among minorities in Mesopotamia (which were a majority in Mesopotamia itself), but the Persian-speaking majority and elite of the Empire always remained Zoroastrian, and conversion to Christianity (and other religions) was apparently not very popular. Even after the...
Let's say Koxinga dies during the war with the Qing, or maybe he died of malaria as in OTL, but a few years earlier, so he never invades Taiwan. Therefore Taiwan would most likely stay Dutch, as the Qing would not have a reason to invade Taiwan.
How would a Dutch Formosa/Taiwan develop? Would...
There are some non-Roman areas in Mauretania that are quite decent. I mean, not as good as the Roman coastal areas, but these areas are not only useless deserts.
It depends when and how Christianity fails exactly. Christianity is still likely to be large religion in the Eastern half of the Empire. It could be that Christianization is reversed, but the East might still have a large Christian population.
If Rome decides to persecute Christians, we...
You might consider using one of the base maps on this site, to create a more beautiful map and to allow for the creation of more precise borders at logical locations, instead of having borders that are aprroximately at the right location.
Also, there are several things which strike me as...
The Arabs would probably still have many armies left and they already conquered a lot of Byzantine territory, I am not sure if the Byzantines can repell them.
In OTL the battle of Nahavand was one the major defeats for the Sassanid Empire. Despite having superior numbers, they were beaten by the Arabs, and afterwards, they were able to conquer Persia.
So what if the Persians win? Will it allow them to keep the Arabs out of Persia, or will the...
Charming is his nickname... his first name is Louis, but his dad and his granddad were named Louis too so to avoid confusion they call him Charming.
So his full name is: Dauphin Prince Louis "Charming"de Bourbon (technically the first 2 are titles though)