Supporting device for a supporting wall, the supporting wall comprising at least one stone stele and forming a supporting wall for an embankment, with a base portion and a holding portion, the base portion and the holding portion being arranged in an L-shaped manner, the holding portion being of planar configuration and having an air side and an earth side, the holding portion having at least one fastening interface for the positively locking, non-positive and/or integrally joined connection of one of the stone steles to the supporting device, the stone stele covering the air side in a state, in which it is connected to the supporting device, the base portion and the holding portion being manufactured from a plastic, the holding portion and the base portion being connected on the earth side via at least one supporting portion, the supporting portion having two supporting portion sides (25a, b), the holding portion having a holding portion recess, and the base portion optionally having a base portion recess, characterized in that the holding portion recess is arranged in the region of the supporting portion between the supporting portion sides (25a, b) of the supporting portion, and the base portion recess optionally being arranged in the region of the supporting portion between the supporting portion sides (25a, b) of the supporting portion, the holding portion recess being arranged towards the air side of the holding portion, the supporting portion forming, by way of its supporting portion sides (25a, b), a housing and roof which is configured to arrange and receive at least one electronic component. the supporting wall comprising at least one stone stele and forming a supporting wall for an embankment, with a base portion and a holding portion, the base portion and the holding portion being arranged in an L-shaped manner, the holding portion being of planar configuration and having an air side and an earth side, the holding portion having at least one fastening interface for the positively locking, non-positive and/or integrally joined connection of one of the stone steles to the supporting device, the stone stele covering the air side in a state, in which it is connected to the supporting device, the base portion and the holding portion being manufactured from a plastic, the holding portion and the base portion being connected on the earth side via at least one supporting portion, the supporting portion having two supporting portion sides (25a, b), the holding portion having a holding portion recess, and the base portion optionally having a base portion recess, characterized in that the holding portion recess is arranged in the region of the supporting portion between the supporting portion sides (25a, b) of the supporting portion, and the base portion recess optionally being arranged in the region of the supporting portion between the supporting portion sides (25a, b) of the supporting portion, the holding portion recess being arranged towards the air side of the holding portion, the supporting portion forming, by way of its supporting portion sides (25a, b), a housing and roof which is configured to arrange and receive at least one electronic component.