A fireback
A fireback is a beautifully designed cast iron panel that people put against the rear wall of something like a hearth or wood-burning oven. Inside the kitchen, fireplace firebacks can also double as backsplashes.
Not only that but they are sometimes placed on either side of the fireplace. The fireback can also be hung on the wall as decoration. A well-made fireback will protect the area of walls near the fire from heat damage.