There's so many things you can do with that empty space:
Make a large-scale statement, with a textured headboard frame and a dark display shelf for artwork. (Bammaw's House)

This intricate decor will bring the focus of your room toward the head of your bed. (Under a Texas Sky)
These were made with fan blades, but almost anything works for the petals. (Diva of DIY)
The wooden white empty frames emphasizes the distressed wooden headboard. (Vintage Headboards)

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