"Louis-Auguste de Bourbon, duc du Maine (31 March 1670 – 14 May 1736) was an illegitimate son of the French king Louis XIV and his official mistress, Madame de Montespan. The king's favourite son, he was the founder of the semi-royal House of Bourbon-Maine named after his title and his surname." - (en.wikipedia.org 06.07.2021)
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