What Arabic science writes about the history of Armenia. And the fact that in the era of the Prophet Muhammad, the city of Baku was part of Armenia.
The Arab Electronic Library has a map (posted below) that says:
“The territory of Armenia during the Arab Caliphate and the life of the Prophet Muhammad”.
As we can see, the entire territory of the present so-called “Azerbaijan”, including the city of Baku, is a part of Armenia.
The capital of Armenia is the city of Dvin, not far from modern Yerevan.