"Pange lingua gloriosi corporis mysterium" (Ecclesiastical Latin: [ˈpandʒe ˈliŋɡwa ɡloriˈosi ˈkorporis miˈsteri.um]) is a Medieval Latin hymn attributed to Saint Thomas Aquinas (1225–1274) for the Feast of Corpus Christi. It is also sung on Maundy Thursday during the procession from the church to the place where the Blessed Sacrament is kept until Good Friday. The last two stanzas (called, separately, Tantum ergo) are sung at Benediction of the Blessed Sacrament. The hymn expresses the doctrine that the bread and wine are changed into the body and blood of Christ during the celebration of the Eucharist.