Determination of the forgery casts serious doubt on its tradition that the Sabbatine Privilege originated in a Marian apparition to Pope John XXII. That the Sabbatine Privilege is an interpretation, based on theological grounds, of the Marian promise to St. Simon Stock is the most plausible explanation of the origin of the Sabbatine Bull. Copies of the Bull indicate a close relationship between the promise to St. Simon Stock and the Sabbatine Privilege. "It would seem, then, that the Sabbatine Privilege arose historically in a fuller understanding of the Marian promise to St. Simon Stock."