The pall is a small square of stiffened linen ornamented with a cross, which is laid upon the orifice of the chalice to protect its contents from flies or dust. The word pallium, or palla, was originally used of all kinds of coverings, notably of what we now call the altar-cloths, and also of the corporal. Even in St. Gregory of Tours (Hist. Franc., VII, xxii) we read of the sacred gifts being veiled by a pallium, which was probably some sort of corporal. But about the time of St. Anselm (c. 1100) the custom seems to have grown up in some places of using two corporals at the altar. One was spread out, and upon it the chalice and host were laid. The other, folded into smaller compass, served only to cover the chalice (sce Giorgi, Liturgia Rom. Pont., II, 220, III, 79-81). This folded corporal is now represented by the little disk of linen which we call the pall. At one time it was forbidden to cover the pall with silk or rich embroidery; now the upper surface may be of silk and embroidered, but the under-side, which is in contact with the chalice, must still be linen. The original identity of the pall and the corporal is further illustrated by the fact that both alike require to be specially blessed before use.