"La Festra di Cattreda, or commemoration of the placing of the chair of St. Peter, on the 18th of January, is one of the most striking ceremonies, at Rome, which follow Christmas and precede the holy week. At the extremity of the great nave of St. Peter's, behind the high altar, and mounted upon a tribune designed or ornamented by Michael Angelo, stands a sort of throne, composed of precious materials, and supported by four gigantic figures. A glory of seraphim, with groups of angels, shed a brilliant light upon its splendors.