Marie Antoinette was here (posthumous)
Square Louis XVIII
A pretty little square in the 8th, with a chapelle, where the remains of Louis the XVI and Marie Antoinette were lain for 21 years, until their remains were removed by order of Louis the 18th, January 21st in 1815 to the cathedrale of Saint Denis where most of the other French kings and queens are buried.
Visit the chapelle or relax in the park.
The square is openat 8am on weekdays and at 9am on Saturdays, Sundays and holidays. It closes at 8:30pm during the summer (during winter I am assuming it’s earlier than that. The time was not posted.)