Arc en mitre (mitre arch ©)

The translation in the title is followed by this sign ©; this means that it has been "invented" by me.

An "arc" ("arch") having the shape of a mitre.
In the picture the clocher (bell tower) of the Saint-Julien in Saint-Julien-de-Civry.

Saint-Julien - Saint-Julien-de-Civry