The invention relates to the fixing of a natural ashlar panel to a substructure with an anchor having an internal thread. The invention proposes that the corresponding blind hole be drilled to residual wall thickness R and the anchor be set in a recessed position. The natural ashlar panels with the anchors can thus be transported to the building site in the form of a compact stack. At the building site, a bolt having a stop element is mounted, which stop element is supported on the anchor. At the opposite end the substructure is clamped against the stop element. In that way, the distance of the outer surface of the natural ashlar panel from the substructure is constant even in the event of varying thicknesses D of the natural ashlar panels. As a result, laborious adjustment work is avoided.