The Probert Encyclopaedia of Architecture

MANTEL

In architecture a mantel is the finish around a fireplace, covering the chimney-breast in front and sometimes on both sides. The term is especially applied to a shelf above the fireplace, and its supports. The mantelpiece or mantelshelf as it was formerly known was originally designed as a shelf for hanging clothes from so as to dry them from the heat of the fire.
Research Mantel