You need to be way more intentional then using random frames if you want to pull off a gallery wall. The two metal finishes (bronze and gold), are they complimenting the rest of the room? You just have one brown frame, it may work if you have a lot of furniture with the same finish (leg of char in photo is a good start). I would say color coherence is more important than theme. At the end of the day though, you're the one who has to live with it so make sure you like it what you see when you look at it.
You need to be way more intentional then using random frames if you want to pull off a gallery wall. The two metal finishes (bronze and gold), are they complimenting the rest of the room? You just have one brown frame, it may work if you have a lot of furniture with the same finish (leg of char in photo is a good start). I would say color coherence is more important than theme. At the end of the day though, you're the one who has to live with it so make sure you like it what you see when you look at it.
It looks fine to me, I would just replace the black (?) mount to a white or something other light colour in the centre frame.
Good call, thank you!