How can I decorate a huge, recessed TV opening over my mantle?

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The opening is approximately 3 ft tall, ft wide, and 2 ft deep. Our TV is too small for the space. The ugly wires and cable/Internet boxes are very visible behind the TV. We can buy a bigger TV or fill in the space around it. Ideas, please?
q how can i decorate a huge recessed tv opening over my mantle
  13 answers