Simple window trim suits many architectural styles spanning hundreds of years. Combined with horizontal wall cladding or bead board paneling with plaster above. Suitable for farmhouse style house, servants quarters or attic in more formal house.
Jenna of jennasuedesign.com transformed every inch of her 1970s nightmare of a bathroom into a space she describes as "a little bit romantic, a little bit boho, and a little bit vintage farmhouse." See how she did it here.