What kind of P.O.D would you need, and what events would have to take place, to have Poland eventually become the Thrid Rome?
Ottomans are more sucessful in Hungary, but Poland moves in and gets Alot of Ottoman Territory on the Periphery, Slovakia and the entirty of the Carpathians, Moldovia, Transylvania, ect....
Eventually a reconquista-esque crusade against the Ottomans leads to Poland being at the forefront setting up a string of vassal states in the Balkans. Eventually Poland controls Constantionaple and claims the 3rd Rome.
Have Poland be Orthodox, for starters.
Their recognition of Rome means that they don't have the hubris to claim they are the Third Rome.
Third Romedoesn't mean the place has to be Orthodox-the first Rome wasn't Orthodox and in fact hated the second Rome. The whole numeration of Romes is kinda fallacious, given that 1. Rome (the 1st) still exists and 2. what are you numbering? Seat of the Roman Empire? The Emperor, the Senate, the Roman people? If so, even Byzantium has a pretty weak claim to the title, at least in its latter years.
I think the claim was mainly religious in Russian case as they were the leading orthodox country and so saw themselves as a successor state of Byzantium.
Byzantium then was the Roman Empire or at least what was left of it. The distinction between Byzantine Empire and Roman Empire is actually a quite modern creation.
Yeah, but my point was that if the distinction was religious then the 'Byzantine' Empire wasn't Roman bceause it wasn't Catholic. If it was Imperial, then it would have to answer to the HRE.
I think you're missing the point entirely - Russia could get away with the pretense of claiming "third rome" status for Moscow exactly because as an orthodox country it didn't have to answer to the Pope and the HR Emperor. The only alternative "third Rome" option would have to be a strongly centralized protestant Poland (a strongly centralized Muslim Poland would face the same problem with the Ottoman Sultan as they would with the HR Emperor, namely that both are already claiming the Eastern and Western halves of Rome along with the imperial titles and no, there's no "third half of the empire" tyvm).
1. Surviving Great Moravia (to keep German attention)
Poland wouldn't be the '3rd Rome' because the King had too little power to make himself Emperor. Furthermore, much of his holdings weer still technically part of the HRE, and another Emperor was nearby. If a Hoy Roman Emperor is excommunicated by the Pope, and there's a Polish king who's particularly virtuous, then he might be elected Emperor just to annoy the HRE. If he can then beat off all comers, he can enjoy his title in peace. It would probably mean the PLC becomes more centralised around the King and the Hetmen rather than the Aparatchiks.
After fall of Constantinople, Mehmed II declared himself as new roman emperor and designed the Ottoman armorial bearings. Also he put some symbols on his paintings. These symbols mean that he see himself as a roman emperor.