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. <EOS>