Grille

Grille, a lattice, or grating, or screen, or open work of metal, sometimes also of wood, generally used to enclose or protect a window, or some shrine, or tomb, or sacred spot. A grille should be all hammered and punched, without filing. The small screen of crossed iron bars inserted in the door of a monastery or prison, for holding conversation and reconnoitring through, is also called a grille.