What is savault?

Some articles on savault:

Château De Brest - History - Statue of Louis XVI
... Jallier de Savault ... Jallier de Savault ” The project was made up of, at the end of the rue du château, an oval "place d'armes", planted in trees ... Jallier de Savault ” This project would, without qualms, have erased 14 centuries of history, but in April 1788 the Comte d'Hector, commander of the French Navy, declared ...