  Magnetic vortices are topological spin structures frequently found in
ferromagnets, yet novel to antiferromagnets. By combining experiment and
theory, we demonstrate that in a nanostructured antiferromagnetic-ferromagnetic
NiO(111)-Fe(110) bilayer, a magnetic vortex is naturally stabilized by
magnetostatic interactions in the ferromagnet and is imprinted onto the
adjacent antiferromagnet via interface exchange coupling. We use micromagnetic
simulations to construct a corresponding phase diagram of the stability of the
imprinted antiferromagnetic vortex state. Our in depth analysis reveals that
the interplay between interface exchange coupling and the antiferromagnet
magnetic anisotropy plays a crucial role in locally reorienting the N\'eel
vector out-of-plane in the prototypical in-plane antiferromagnet NiO and
thereby stabilizing the vortices in the antiferromagnet.
