Emergency repairs have been carried out to the gable wall of Halifax Central Library and Archives.
The area at the base of the wall in Gaol Lane has been fenced off for months because of fears about stone facing blocks falling onto passers-by.
Safety work has now been carried out by Calderdale Council.
A spokeswoman said that there was evidence that some of the blocks had begun to split and it was essential that emergeny work was carried out.
The council has spent months consulting people about whether they favour a new library being built at the bottom side of the Piece Hall.
That came to an end on September 30 and the results are expected to be published in November.
Then the council hopes to reach a decision on the future of the building and wider plans for developing the town centre including setting aside the Northgate area for retail use.