Exterior Soffit Vents
Here two exterior soffit vents, that are
installed in this stucco ceiling.
The soffit vents have wood stucco molding around them and look like they're in pretty good shape.
While doing your home inspection, try to find out if there are any more areas that need ventilation around the building.
Sometimes these soffit vents are enough to ventilate a small mansard roof like this one. Other times these vents are used to provide ventilation to other parts of the roof.
If that's the case you will find more vents around the roof of the building.