Since natural materials are used for the manufacture of classic furniture, which are quite expensive, everything should be verified, in harmony with household appliances and, in fact, with wall decoration, ceiling and floor. Wallpaper usually choose calm, warm tones. The ceiling is necessarily white, possibly with stucco molding elements. As for the doorway, you can use the arch between the kitchen and the living room. If the doors are supposed to be installed, then they should only be made of wood. You can install stained glass glasses for a kind of interior decoration.