It depends on a lot of things. Would need a photo. Here is an example that works, because the pattern in the art is large in scale in relation to the wallpaper.

In general, I don't think a gallery of art is not a good idea.

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Sometimes a larger matt or more bossy frame works to provide some separation and add prominence to the art, sometimes it isn't need. So, it Really depends on the art... the strength of the imagery, the size, the colorway,the negative space etc. Without pics,can't offer any more specifc advice but here's a pretty pic from Mark D. Sikes

Photo please?

I need a picture of the wallpaper and also the pieces you are planning for that wall.

WE need a photo, please.

I love the look of busy wallpaper with art on top. I think it can look fabulous. It can also go in the opposite direction. I would love to see photos of what you have planned.

The wallpaper isn't up -- yet! But when it is, I'll share. As for what is planned, the mirror and sconces -- which may be enough, but I thought perhaps a botanical/floral of some kind -- oil painting perhaps, or a few plates. Thanks for the feedback. Photo to come.

Really as a designer you must realize this question has no answer without context.

I was wondering.....are you designing this room for a client?

By the way, you have some beautiful photography.

My design services are photography oriented, as that is my business. Wallpaper has been out-of-state since I started working as a photo-placement advisor and framer. The question about this particular wallpaper is for a room of my own.