1) Mantelpiece 
A fireboard or chimney board is a panel designed to cover a fireplace during the warm months of the year. It was `commonly used during the later 18th and early 19th centuries` in places like France and New England. In warm weather, `a fireboard effectively reduced the number of mosquitoes and other insects, or even birds, that might enter a hou......
• (n.) A chimney board or screen to close a fireplace when not in use.
Fire'board` noun A chimney board or screen to close a fireplace when not in use. 
a board used to close a fireplace. · a mantel; mantelpiece.