International dynastic marriages

The idea is that dynastic marriages are expanded and not rather tied to regions or just in Europe. In theory: The Czar of Russia marries a woman from the ruling Qing Dynasty.

What needs to change to make this not too controversial?

PoD is no earlier than 1500
 
The idea is that dynastic marriages are expanded and not rather tied to regions or just in Europe. In theory: The Czar of Russia marries a woman from the ruling Qing Dynasty.

What needs to change to make this not too controversial?

PoD is no earlier than 1500
I mean for Russia something like this did happen. Tsar Ivan the Terrible married a Tartar Princess named Maria Temryukovna, how "controversial" it is depends on the sources used, because apparently not too many people liked her, that she ended getting a bad reputation. Although it must be noted the Russia and later Rus before did have complex and extensive relationships with the Mongols and their Tartar successors, so much so that several nobles apparently claimed to be descended from Mongol nobility and by extension Genghis Khan.
 
The Empire of Brazil featured a Habsburg Empress I think. Emperor Maximilian II von Habsburg of the Second Mexican Empire adopted the Mexican d'Iturbides as his successors since he had no children. He likely would have brokered a Habsburg marriage to unite the two houses.
 
I hypothesized situation where George III fails to purchase the Isle of Mann in the mid 18th Century.

Charlotte, Lady of Mann is declared Queen and much like they did the USA in OTL, Morocco recognises their independence from the Empire of the British Isles, and as a result becomes a major trading partner, and Charlotte marries her daughter to a minor son of the Sultan.

As a result, many years later, the King of Mann has both British and Moroccan ancestry, descending from the Alaouite Dynasty.
 
What needs to change to make this not too controversial?
Religion. If China converts to Christianity, noone would care. The problem might be that China is too far away, thus such a marriage is not terribly useful, but it might be outweight by the fact that China is China already known as an ancient empire and the fact that the daughter of the emperor of China is the daughter of an emperor, thus marrying her would give a lot of prestige, even if China is too far away to be a useful ally.
 
Religion. If China converts to Christianity, noone would care. The problem might be that China is too far away, thus such a marriage is not terribly useful, but it might be outweight by the fact that China is China already known as an ancient empire and the fact that the daughter of the emperor of China is the daughter of an emperor, thus marrying her would give a lot of prestige, even if China is too far away to be a useful ally.
How about partial conversion? Like, the Emperor agrees to marry the daughter off to the Czar but the daughter has to convert first. Would that work out? Without whole of China converting which seems difficult with a PoD no earlier than 1500 AD.
 
How about partial conversion? Like, the Emperor agrees to marry the daughter off to the Czar but the daughter has to convert first. Would that work out? Without whole of China converting which seems difficult with a PoD no earlier than 1500 AD.
The problem is not only on the European side, but also on the non-European side. The problem with dynastic outmarriage is that many of the states in question wouldn’t do it before European states had shown a clear military and political dominance, and then there’s little reason for the Europeans to do so.

Rhe next problem is that European dynastic marriages worked different than elsewhere thanks to European monogamy. If you married your daughter to a European monarch, your would most likely end up grandfather to his heir. While by marrying a European princess you made your part of the succession line.

As such I think the most likely dynastic outmarriage would be African and South East Asian petty kingdoms, which had converted to Christianity.
 
The idea is that dynastic marriages are expanded and not rather tied to regions or just in Europe. In theory: The Czar of Russia marries a woman from the ruling Qing Dynasty.

What needs to change to make this not too controversial?

PoD is no earlier than 1500
The Ethiopian Emperor Theodorus proposed to Queen Victoria but was rejected. Instead the Empire waged war upon him.
 
The Empire of Brazil featured a Habsburg Empress I think. Emperor Maximilian II von Habsburg of the Second Mexican Empire adopted the Mexican d'Iturbides as his successors since he had no children. He likely would have brokered a Habsburg marriage to unite the two houses.

Yes Brazil first empress was a Habsburgh,Dona Leopoldina,and pretty much beloved by the people,she was the founding mother of the country.We also had Amélia of Leuchtenberg as 2 empress and our third and final empress was a Bourbon/Two -Sicilies
 
The Empire of Brazil featured a Habsburg Empress I think. Emperor Maximilian II von Habsburg of the Second Mexican Empire adopted the Mexican d'Iturbides as his successors since he had no children. He likely would have brokered a Habsburg marriage to unite the two houses.
The Brazilian Empire was ruled by a branch of an European royal family
 
I was thinking of Joanna/Joan, the sister of Richard I and found this succinct retelling on Wiki

Third Crusade[edit]
Finally, her brother King Richard I of England arrived in Italy in 1190, on the way to the Holy Land. He demanded her return, along with every penny of her dowry. When Tancred balked at these demands, Richard seized a monastery and the castle of La Bagnara. He decided to spend the winter in Italy and attacked and subdued the city of Messina, Sicily.[6] Finally, Tancred agreed to the terms and sent Joan's dowry. In March 1191 Eleanor of Aquitaine arrived in Messina with Richard's bride, Berengaria of Navarre.

Eleanor returned to England, leaving Berengaria in Joan's care. Richard decided to postpone his wedding, put his sister and bride on a ship, and set sail. Two days later the fleet was hit by a fierce storm, destroying several ships and blowing Joan and Berengaria's ship off course. Richard landed safely in Crete, but they were stranded near Cyprus. The self-appointed despot of Cyprus, Isaac Comnenus was about to capture them when Richard's fleet suddenly appeared. The princesses were saved, but the despot made off with Richard's treasure. Richard pursued and captured Isaac, threw him into a dungeon, married Berengaria on 12 May 1191 at Limasol, Cyprus and then sent Joan and Berengaria on to Acre.

Joan was Richard's favourite sister, but he was not above using her as a bargaining chip in his political schemes. He even suggested marrying her to Saladin's brother, Al-Adil, and making them joint rulers of Jerusalem. Although Al-Adil and Saladin both expressed agreement with the arrangement, the plan failed when the high ranking priests opposed the wedding and threatened Richard that he would be excommunicated from the Christian Church. King Philip II of France also expressed some interest in marrying her, but this scheme, too, failed (possibly on grounds of affinity, since Philip's father Louis VII had formerly been married to her mother).
 
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