Sometimes you'll see this in an interior:
A mirror placed on top of another mirror.
I know exactly what my husband, the engineer (Mr. Practical), would say if he saw this...
Because he’s not one for doing something purely for the sake of beauty or aesthetics - it has to serve a purpose. And if he’s going to spend money, it better be a BIG purpose. :-/
I, on the other hand, would do anything for the beauty of it, for the visual treat it would bring me.
I’m thinking that’s the case here: when a smaller framed-mirror is mounted on top of a mirror that’s been applied to the wall, or even one framed-mirror on top of another.
If there’s already a mirrored surface, then you might want to bring a bit more punctuation to that wall. You might want to draw attention to it a bit more, or add a little more sparkle.
Sunbursts are nice to use here as the top mirror to eliminate a repetition of shape and to highlight their beautiful finish and frame.
Or perhaps you just have a lot of mirrors?
Whatever the reason... I love it.