Looks like Jesus, lol.
Maybe check this article https://www.derstandard.de/story/2000141703142/wer-war-vlad-dracula-forscherpaar-macht-sich-mit-neuer-methode
or that here: https://www.britannica.com/biography/Vlad-the-Impaler
btw - the 'famous' painting they always show hangs at the castle Forchtenstein in Austria: https://esterhazy.at/burg-forchtenstein - I seen it there many years ago in person. The connection of the Esterhazy family is that they are related.
There are some links that may prove fruitful about the East Roman Empire on this Wikipedia article: https://en.wikipedia.org/wiki/Byzantine_Empire
or if you don't trust Wikipedia, check this one: https://www.britannica.com/place/Byzantine-Empire
and when all else fails, go to Istanbul yourself and ask Erdogan.
Damn, we almost visited burg Forchenstein last year, but went to the Esterhazy palace instead, and thus miss out on meeting Vlad.
If you are in the research mood, in Austria there is also the castle Lockenhaus where you can find inspiration about another monster, Die Geheimnisse der Blutgräfin Elisabeth Báthory: https://www.ritterburg.at/burg/geschichte
Es gibt Führungen in der Burg Lockenhaus, über die Blutgräfin ebenso auch über Dracula:
https://www.ritterburg.at/erlebnisse/fuehrungen
The Austro-Hungary history is deeply connected to these, as Dracula's home province (now in Romania) was once called Siebenbürgen and was part of Hungary.
Seems both Vlad the Impaler and Elizabeth of Bathory were inspirations for Dracula.
both the castles Lockenhaus and Forchtenstein have special presentations on that subject. The Austrian province of Burgenland was once part of Hungary, and further back in history, Hungary was part of the Austrian Empire, and Hungary extended over the greatest parts of todays Romania, where Dracula originated. Transilvania was called Siebenbürgen at that time and had a sizable population of German origin (even to this day).
I seem to recall some TV show covering her story. I believe they bricked her up in a cell in the end when they found out what she was doing.
Forchtenstein Dracula:
more about Forchtenstein: https://www.vienna-unwrapped.com/forchtenstein-castle/
How I wish I could understand this video.... I'm decoding with the pictorial view, I'll try to check this later
Seems there are no automatic subtitles for this video.