So here are two, in my humble opinion, magnificent French formal gardens which add a touch of modern to the classical scheme of a "jardin à la française" with some interresting ideas to borrow...
Manoir d'Eyrignac - Dordogne
Parterre à la française with three degrading box dots at the bottom.
Chateau de Marqueyssac -Vezac, Perigord
Intricatedly sculpted box parterres ( btw at Marqueyssac there is a remarcable collection of Buxus sempervirens of different varieties)
For all who want to know more about: