Galois Theory in Symmetric Monoidal Categories

The Galois theory presented here is at a level of generality essentially between that of G. Janelidze, D. Schumacher, and R. Street (1993, Appl. Categ. Structures1, 103–110) and G. Janelidze (1991, Lecture Notes in Mathematics, Vol. 1488, pp. 157–173). However, our purpose is to concentrate on symmetric monoidal categories and so provide a new approach to Tannaka duality.