Sanctus's the Latin word for holy or saint, and's the name of an important hymn of Christian liturgy. In the Roman Catholic church, an indulgence of 100 days's associated with the Sanctus when prayed once a day together with the Trisagion, with a contrite heart to adore the Holy Trinity. In Western Christianity, the Sanctus's sung (or said) as the final words of the Preface of the Eucharistic Prayer, the prayer of consecration of the bread and wine. The preface, which alters according to the sea… (More on Sanctus)