In the central boss of the church, above the central altar, are three heraldic shields marking the dedication, one of the few features of decoration. The arms are those of Pius XI, the reigning pope at the completion of the church, the shield of Citeaux, and that of Mount St Bernard/Abbot Malachy. The arms assumed for Mount St Bernard are: "Or, a crozier in pale, with a sudarium sable; on a chief azure, three lions rampant or" - the latter being the arms of the founder, De Lisle.