mantel

2. The decorative frame or structure around a fireplace.

The old house had a carved wooden mantel around the hearth.

3. A beam or stone piece that supports the masonry above a fireplace opening.

The mason set a heavy stone mantel to hold the bricks above the fire.

4. A shelf-like structure on a wall used for holding ornaments.

He lined up his trophies along the mantel in the living room.