"O salutaris hostia" is a Catholic Eucharistic hymn written by Thomas Aquinas for the Feast of Corpus Christi. The text is part of Aquinas's larger liturgical work, including the hymns "Pange lingua," "Tantum ergo," and "Panis angelicus," composed around 1264 when Pope Urban IV instituted the feast. The hymn is a Latin poem expressing adoration of the Blessed Sacrament, with "hostia" referring to the Eucharistic bread, viewed as a sacrificial offering, and "salutaris" meaning "saving" or "salutary."
The phrase translates to "O saving victim" or "O saving sacrifice," emphasizing the theological concept of Christ's sacrifice in the Eucharist. It is traditionally sung during Eucharistic adoration and benediction, especially in monastic and liturgical settings. The hymn is written in double sapphic meter and is set to a Gregorian chant melody.
It remains in use in the Roman Catholic liturgy, particularly in the Liturgy of the Hours and devotional practices. Numerous musical settings have been composed over the centuries by figures such as Giovanni Pierluigi da Palestrina, Tomás Luis de Victoria, and Anton Bruckner.
This hymn is an established part of the Catholic liturgical and musical tradition, with reliable documentation in ecclesiastical and musicological sources.