.... And some cow or goat had an appetite for the marginal vines that grew on the walls. That's why they had to be protected - with wooden bars. In a broader sense, they belong to the family of wooden trellis. The vertical laths were mounted on bent steel bands or on short, wooden cross bars. In part, also ledges were bridged, and thus created small works of art. Together with a designed planting pit, these lattices have rounded off the greening of façades. In the meantime, they have disappeared from the streetscape. The few, remaining copies, especially in the Saale-Unstrut area would actually be a case for the monument protection!
Perhaps the small documentation on this page may encourage you to re-attach such grids here and there as an alternative to metal grids! Because even today, protective mesh can be useful, for example, to prevent cats from using a vine trunk as a "scratching tree".