E13 Revealing and repairing lime walls (in a 100 year old school)

I am restoring two rooms and a bathroom to its former glory from the 1920s of my old school in Sweden. The walls that I have uncovered needs a lot of repairing and I have also changed the layout of these rooms as they will be a seperate rental unit apart from my home.
I am repairing the walls in this vlog mainly to make the walls even and not to loose their structual ability (to prevent more lime render and mortar to loosen)
Next job will be to insulate the walls and build new layers of lime plaster on top of this to match the internal walls. And I also have the floors and ceiling to restore, so stay tuned, a lot of things will happen this summer.