Vortrag: Nonnegatively curved fixed point homogenous 5-manifolds Abstract: Let G be a compact Lie group acting effectively by isometries on a compact Riemannian manifold M with nonempty fixed pint set Fix (M,G). We say that the action is fixed point homogenous if G acts transitively on a normal sphere to some component of Fix (M,G), equivalently, if Fix (M,G) has codimension one in the orbit space of the action. We classify up to diffeomorphism closed, simply connected 5-manifolds with nonnegative sectional curvature and an effective fixed point homogenous isometric action of a compact Lie group.