This is the chateau de Nesles, a medieval fortress not very far from Reims in Eastern France. I drove by when visiting a US military cemetary I diaried about in June: Might.
It's quite near to the monastery where one of my aunts is a nun:
In the long run, we're all dead. John Maynard Keynes
The abadoned castle at Bzovík (Bozók) - our regular lunchtime stop during the cementery visits.
(A grand-grandmother is buried in the nearby village. She gave birth to my grandfather unmarried, because the estranged first wife of my grand-grandfather didn't want to divorce - but, being the village notary, my grand-grandfather was tricky: he simply changed both his own - from his Czech father - and her - from a German ancestor - surname to the same Hungarian surname... which I inherited.) *Lunatic*, n. One whose delusions are out of fashion.