What if Plantagenets ruled the Holy Roman Empire

What if a Plantagenet was able to marry a Swabian heiress and was able to gain land in Germany and be crowned as the Holy Roman Emperor how would it affect the Anglo-French and Franco-Imperial/German relations.
 
because they gained a powerbase in the Holy Roman Empire by marrying a Hohenstauffen heiress.

They're in rather short supply, unfortunately.

But let's say Conradin has a sister and Richard of Cornwall marries her. Fine.

What makes anyone support Richard's son? Sure, they have a power base, but so do stronger (and/or more desirable) candidates.
 
They're in rather short supply, unfortunately.

But let's say Conradin has a sister and Richard of Cornwall marries her. Fine.

What makes anyone support Richard's son? Sure, they have a power base, but so do stronger (and/or more desirable) candidates.
I think they will try to gain the Throne of Sicily before they gain the German throne, the question is would they succeed in doing so and they have four enemies namely Charles of Naples, Rudolf of Habsburg and Manfred of Sicily, I think the son of Richard of Cornwall would ally with Przemysl Ottokar against the Habsburgs.
 
I think they will try to gain the Throne of Sicily before they gain the German throne, the question is would they succeed in doing so and they have four enemies namely Charles of Naples, Rudolf of Habsburg and Manfred of Sicily, I think the son of Richard of Cornwall would ally with Przemysl Ottokar against the Habsburgs.

Okay, hold on.

Richard is presumably marrying Conradin's sister (hereafter Elizabeth after her mother) as his third wife.

Any son from such a marriage would still be a boy - not even as old as Conradin when he died - in the 1270s.

Manfred is out of the way. Rudolf probably doesn't care if a ten year old boy is duke of Swabia.

So that leaves Charles of Sicily - and Peter of Aragon, who probably doesn't want to give up his claim to Richard's son.

I'd address the issue of why supporting Ottocar, but given his age, Richard's son is in little position to support anyone - and Richard has lands and responsibilities elsewhere (part of why he neglected Germany OTL).
 
Okay, hold on.

Richard is presumably marrying Conradin's sister (hereafter Elizabeth after her mother) as his third wife.

Any son from such a marriage would still be a boy - not even as old as Conradin when he died - in the 1270s.

Manfred is out of the way. Rudolf probably doesn't care if a ten year old boy is duke of Swabia.

So that leaves Charles of Sicily - and Peter of Aragon, who probably doesn't want to give up his claim to Richard's son.

I'd address the issue of why supporting Ottocar, but given his age, Richard's son is in little position to support anyone - and Richard has lands and responsibilities elsewhere (part of why he neglected Germany OTL).
I think Conradin's sister could marry to a son of Richard of Cornwall, Edmund the son of Richard of Cornwall and Sanchia of Provence, the Question is how would Edmund fare against Rudolf, Charles or Peter.
 
I think Conradin's sister could marry to a son of Richard of Cornwall, Edmund the son of Richard of Cornwall and Sanchia of Provence, the Question is how would Edmund fare against Rudolf, Charles or Peter.

Edmund was born in 1249, and his father (OTL) died in 1272 at sixty-three (a ripe enough age that it's unlikely to change much for the better).

How seriously would anyone take Edmund's claim to be duke of Swabia by right of marriage to Elizabeth? As in, will he even be able to get to the point of having a powerbase?

How much will Edmund press that when he has Cornwall and issues back home to deal with?
 
Edmund was born in 1249, and his father (OTL) died in 1272 at sixty-three (a ripe enough age that it's unlikely to change much for the better).

How seriously would anyone take Edmund's claim to be duke of Swabia by right of marriage to Elizabeth? As in, will he even be able to get to the point of having a powerbase?

How much will Edmund press that when he has Cornwall and issues back home to deal with?
I think he could ally with Premysl Ottokar against the Habsburgs, he can waive Cornwall just like what his relative Otto did to Aquitaine but the question is can he win against the Habsburgs?
 
I think he could ally with Premysl Ottokar against the Habsburgs, he can waive Cornwall just like what his relative Otto did to Aquitaine.

So waive something definite and profitable in exchange for something uncertain and disrupted.

Why?

And why would he want to side with Ottokar?
 
because Rudolf of Habsburg would be their common enemy.

Not necessarily the Habsburgs traditionally were supporters of the Hohenstaufen in the period before Rudolf got elected as king of the Romans. Now ITTL Rudolf could still be a more desirable candidate than Ottokar who had a substantial powerbase, which was a potential threat for all the other Great Houses in the Empire. Splitting it up like IOTL with the Habsburgs (or another house) gaining Austria & Styria would still be more acceptable than the situation, where Ottokar stays in control of Bohemia, Moravia (,Glatz), Austria, Styria, Carinthia, Carniola and the Windic March. Like IOTL the last 5 territories, most recently gained by Ottokar, would be territories, which could be stripped from Ottokar and redistributed.
 
It isn't going to work to have a Plantagenet come in out of the blue like Richard of Cornwall did, and to try to build his power from the ground up. What might work better is for a Plantagenet prince to marry a Hohenstaufen heiress, and then to be appointed Duke of a German state by the emperor when the state reverts to the crown because the dynasty dies out. He rules effectively and loyally, becomes a popular ruler and founds a dynasty.

After Conradin's death, the German branch of the Plantagenets is a possible source of a candidate for HRE.

One difficulty has to be butterflied. The Plantagenets and Hohenstaufens were enemies in OTL. The Plantagenets were connected by marriage to the Hohenstaufens' rivals, the Welfs from the reign of Henry II of England. The enmity persisted through the following generations, manifesting itself with Henry VI's imprisonment of Richard the Lionheart, the Bouvines campaign in King John's time and Henry III's futile plan to depose Frederick II in favor of Henry's son Edmund.
 
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One difficulty has to be butterflied. The Plantagenets and Hohenstaufens were enemies in OTL. The Plantagenets were connected by marriage to the Hohenstaufens' rivals, the Welfs from the reign of Henry II of England. The enmity persisted through the following generations, manifesting itself with Henry VI's imprisonment of Richard the Lionheart, the Bouvines campaign in King John's time and Henry III's futile plan to depose Frederick II in favor of Henry's son Edmund.
And do not forget Richard's support of his nephew Otto who became emperor Otto VI, the only Welf ever to become Roman Emperor. (And BTW Otto had been Richard's heir until he got the chance to become emperor.)
 
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