I would love to find a big, old wall panel like this-left.
The inset cupboard- right is very much like mine in the French house salon; Old windows used as glass doors in this context are another good idea. Looks right, minimises dusting! Below left- an antique ( in this case Indian) door creates a wonderful entrance to a simple but evocative space. Below right- Eclectic display including two old curtain tassles. My kind of beautiful.
Or see my pinterest board https://uk.pinterest.com/bladenfielding/rustique-raffin%C3%A9-une-maison-modeste/