Multi-layer body with machine-readable coding

Multilayer body (2), particularly security element for the protection of security documents (1) with a machine-readable coding, wherein the multilayer body (2) a first layer (24, 22) of a dielectric material and a second layer (23) partially on the first layer of an electrically conductive material, characterized in that in a first surface area (41 to 45) the second layer (23) is molded in the form of a plurality N of antenna structures (51 56, 61-66, 71-78, 451-456) that the N antenna structures (51-78; 451-456) are formed respectively by a structure in coil form with a conductive strip (511, 611) arranged as a coil, that the N antenna structures are arranged adjacent to one another, that the N antenna structures in each case have different geometries and different predetermined resonant frequencies and provide the coding legibl ea machine, and the multilayer body (2) has an optically active arranged at least in a subarea of ​​the first surface area (41) layer (22) and the second layer (23) forms a metallic reflection layer of a characteristic optically perceptible security and thus additionally forms a functional layer of the optically perceptible security feature.