I could use some ideas on what I can do to dress up a large wall in my dining room. It is an open floor plan t?

the living room. Now use your imagination to invision the room. One wall is a fireplace wall, open on each side to the living room. Opposite that wall is the outer wall with 2 large windows over looking a river. On each side of the windows I have painting (floral) that are somewhat tall, rectangular that are a great compliment to the windows. My problem are the 2 remaining walls. One of them has a door leading to the kitchen and the other is large and empty with the exception of an upright piano that is set against it. Above the piano is a big bare space which can be seen from my living room as well as the dining room. I can't hang a mirror because I have two large mirrors hung already. Over the fireplace is also a large floral painting. So I have sort of a theme here. All 3 painting were done by the same artist and compliment one another. Any idea's what can be put on this blank wall?????