The fate of those princesses always made me feel very sad. I firstly began to study their lives and fates after frequenting an interesting seminar at the university about the Spanish War of Succession (after the death of Karl II, the last Spanish Habsburg monarch, he was the brother of Margarita and also halfbrother to Maria Theresa, mother of Louis XIV).
It's very not nice that they often died so early and were quite weak because of the close blood-relationship to their husbands and the many pregnancies. Margarita had this fate as well, she was so young and so tenderly, and died so early. From her four children only Maria Antonia survived (whose son later should play an important role in the mentioned Spanish War of Succession). Margarita was only fifteen when marrying Leopold, her uncle. I did not know that Leopold seemed to have more feelings for her than for her later wifes. Leopold I's last wife was the strongest one , I suppose, she became 65 years old (not that much for our age, but at that times quite "old", especially in comparison to the predecessors). With Eleonore Magdalena of Pfalz Neuburg, who gave Leopold many children, especially the two emperors Joseph I and Karl VI (III), the Habsburg family firstly became new blood after many times of "overgeneration".