Tusey (also spelled Tuzey or Touzy) is today a hamlet of Vaucouleurs on the Meuse.
It is first mentioned in documents of 859–65 as Tusey-sur-Meuse (Tusiacum super Mosam or Mosellam).
From 22 October to 7 November 860 a church council was held there under King Charles the Bald.
A large cut stone, about one metre square, known locally as the borne d'Empire, "bollard of the Empire", is probably a boundary marker placed at the site of the 1299 meeting in a then forested area (since named Quatre-Vaux) between Philip IV of France and Albert I of Germany – the so-called meeting of the Emperor and the King.
The boundary markers that came out of this meeting were topped by bronze pieces, removed during the reign of Henry II.