A brilliantly researched academic article below.
But…It’s possible that Simeon Bekbulatovich and the Hapsburg Holy Roman Emperor Maximilian II are one and the same person.
Is this why the Triumphal Procession of Emperor Maximilian I is so full of blank spaces?
Triumphal Procession of Emperor Maximilian I
Oh, Those pesky sources!
Simeon Bekbulatovich’s Remarkable Career as Tatar Khan, Grand Prince of Rus’ and Monastic Elder