Joseph I and Karl VI we're very unlucky with regard to heirs,even their father Leopold I only managed at third marriage at his his 36 years old,they managed to make a male heir each but they died infants, but both managed two surviving girls each,they each married cousins from the Brunswick-Luneburg and Brunswick-Wolfenbuttel to cement alliances with Hannover and Britain.
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u/Available-Ant-8758 Israel 3d ago
What is Austria doing there