My home is over 100 years old. I don't know when the ceiling was put up but it's been painted over a few times I'm sure. It looks like a tiled drop ceiling but I haven't seen any signs of a grid or any type of suspension. The ceiling is about 6 inches lower than it is in the adjoining rooms which are plaster ceilings. Many tiles feel nice and sturdy, but a few are almost paper thin and now have finger sized holes from where I pushed on them. I'm okay to leave as is. I don't want to get into pulling the whole ceiling down. But is there any other way to repair this? It isn't as easy as just swapping out the broken tiles with new.
These probably do have suspension. I would just leave them the heck alone.
