  Strong similarities have been long observed between the Galois (Categories
Galoisiennes) and the Tannaka (Categories Tannakiennes) theories of
representation of groups. In this paper we construct an explicit (neutral)
Tannakian context for the Galois theory of atomic topoi, and prove the
equivalence between its fundamental theorems. Since the theorem is known for
the Galois context, this yields, in particular, a proof of the fundamental
(recognition) theorem for a new Tannakian context. This example is different
from the additive cases or their generalization, where the theorem is known to
hold, and where the unit of the tensor product is always an object of finite
presentation, which is not the case in our context.
