Was Marie Antoinette considered a fully legitimate bride for the heir apparent to the French throne in 1770? [closed]

Question

When Marie Antoinette married Louis-Auguste, Dauphin of France in 1770, who later became King Louis XVI of France, was she considered as a fully legitimate bride or was there some sort of political compromise involved? On the one hand, her mother was the Holy Roman Empress Maria Theresa, but on the other I don't recall any French Kings who had married Habsburg princesses at any earlier times.

Did the members of the House of Bourbon look down on the Habsburgs or the inverse (or both) for heraldic reasons? Were there any explicit house rules by which French royals had to obey in such matters and at that time? (If memory serves, the Habsburgs would later list approx. two dozen families whose daughters they considered legitimate matches.)

Answer 1

As a bride, Marie Antoniette might have been disliked by some due to the longstanding conflict between the two dynasties. But in terms of legitimacy, I'm not sure what could be illegitimate about being an Archduchess of Austria. Indeed, I'm not sure how one could ask for a more legitimate bride than a princess of Europe's most prestigious royal house.

In fact Kings of France had been marrying Habsburg princesses long before Louis XVI:

• Francis I's Queen Eleanor of Austria
• Charles IX's Queen Elisabeth of Austria
• Louis XIII's Queen Anne of Ausria
• Louis XIV's Queen Maria Theresa of Spain

Answer 2

The striking thing was that France and Austria had been political rivals going back to the time of Francis I (France) and Charles V (Austria). Until the mid 18th century.

After winning the 100 Years' War, France became the strongest power in western Europe. Spain and Austria (counting the Holy Roman Empire) were two and three, and when Princess Juana of Spain married Prince Philip of Austria to produce (Holy Roman) Emperor Charles V, the combination of the "next two" became stronger than number one.

Fast forward to the 18th century. After two centuries of mutual antagonism, France and Austria were pushed into an uneasy alliance against a combination of two new "upstart" powers. England had about one-third the population of France, and Prussia about one third of the population of Austria-Hungary, but both of them "punched above their weight," to the point of "stalemating" France and Austria-Hungary (Russia switched from the Franco-Austrian to Anglo-Prussian side at the end of the Seven Years' War.)

The marriage of Austria's Marie Antoinette and France's Louis XVI cemented the alliance of two "legitimate" great powers against the two "upstarts."

It's also noteworthy that Maria Theresa herself was married to Francis, Duke of Lorraine (then a part of France). If the Austrian Court was willing to marry the heiress to the throne to a French duke, it certainly wouldn't object to a non-heiress princess marrying a Dauphin.