This is an odd modern-shaped octagon window I have in my non-modern house. I used a bold graphic circle piece to try to draw the eye away from the shape of the window. It was a frame to a broken mirror in an as-is section. It is hung with a single hook using the mirror's original hanging hole.
This is over my front door and is an eyebrow window. I needed a cascading piece to account for the arch. This is just leaned in the window (it is lighter and has never even moved no matter how much the door has been opened and closed).