This weekend, a friend of mine asked about the look of vintage window frames so I did a little research for her.. and thought well here's my post of the day! I immediately thought of a more cottage feel, but they can work in a variety of styles.
Like this one. I like the symmetry of the two window panels on the back wall in a fresh interior.
Here's some other fun ways to use em:
If you're a collector, a collage on an entire wall could look really cool