And why isn’t the Ottoman Empire considered to be an extension of the Roman Empire? Mehmed II claimed the title of Kayser-i Rûm, and the title had changed between families and religions before 1453.
I used the accepted date of the fall of the Roman Empire in my earlier comment, but there is an argument that it only ended 95 years ago.
The emperor was Alexios IV Angelos, an unpopular emperor who didn’t pay his contractors and caused religious tensions in his realm.
Why does this sound familiar?