103 year old new home owner

Purchased house 6 months ago. Had 2 independent inspections done due to some foundation horror stories I have heard about old homes. Both came back very well with no structural problems found at all. Inspectors both said this house is in better shape than new construction.

Now its winter and I am starting to see thin cracks form in some ceilings and above some doors. Is this normal for a house of this age or do I have a problem? Thank you in advance.