Richard had made enemies from Sicily to Cyprus during his crusade and alienated his allies in France and the holy Roman empire which quickly came back to haunt him.
Roman, and not imperial Holy Roman Emperor, was Marie Antoinette’s brother. I should note, by the way, that at this point, the Holy Roman Empire was basically just Austria.
Historically and up to the present day to an extent, Afghanistan continues to operate in a way that's more similar to the holy Roman empire than the European Union.
Voltaire famously pointed out that the Holy Roman Empire Wits neither holy, nor Roman, nor an empire; but the Habsburgs, who presided over it for more than 300 years, often had other ideas.
Her father was Emperor Charles VI, ruler of the Holy Roman Empire, Archduke of Austria, King of Hungary and Bohemia, and head of the House of Habsburg.
For example, some Mozart scholars believe the Queen of the Night symbolizes Maria Theresa, the Empress of the Holy Roman Empire who opposed Freemasonry and banned it in Austria.
After the western Roman empire fell in 476 AD, or some other year, the kings of the so-called Holy Roman Empire, 962 to 1806 AD routinely referred to themselves as Kaiser, the German form of the name Caesar.