Assembly consisting of an object (1) with at least one fastening section (2) and a fastening device (3) attached or attachable thereto, which has a first fastening unit (10) with an
adhesive anchor (100) for stable permanent
adhesive fastening of the object (1) to a wall and comprises a second fastening unit (20) for stable permanent
adhesive fastening which differs from the first fastening unit (10) in its
physical design and in its adhesive properties, wherein - the adhesive properties of the first and second fastening unit (10, 20) differ in their
curing time, - the first fastening unit (10) has a chamber that can be filled with a first adhesive and has a flat opening side extending parallel to a wall section to be assigned, which is bounded by an edge, and the second fastening unit (20) has a flat support plate (200) at least partially surrounding it, with at least one adhesive element (201, 202) which is provided with a second adhesive on its adhesive surface facing the wall section to be assigned, - the edge surrounding the flat opening side has a flat fixing surface facing the wall section to be assigned in the fastening state, which is provided with a fixing adhesive, - the second fastening unit (20) has a recess (203) whose clear width is dimensioned so that it at least partially surrounds the first fastening unit (10) in the fastened state, and - the first and second fastening units (10, 20) are provided with connecting elements (102, 204, 204') for attachment to a fastening section (2) of the object (1).