By Giuseppe Monno
The inscription IHS, often stamped on the consecrated host during the Eucharistic celebration, is a Christogram—a monogram made from the name of Jesus Christ. It comes from the first three letters of Jesus’ name in Greek: ΙΗΣΟΥΣ (Iēsous). When rendered in the Latin alphabet, this becomes IHS (or sometimes IHC, depending on early script forms).
In Greek, the letters Ι (iota), Η (eta), and Σ (sigma) form the beginning of the name Iēsous. As Christianity spread into the Latin-speaking world, these letters were adapted to the Latin alphabet. The Greek letter eta (Η), which represents a long vowel, was eventually read as the Latin letter H. This is how the form IHS came into use.
During the Middle Ages, the monogram IHS took on deeper symbolic meaning and inspired several devotional interpretations:
– Iesus Hominum Salvator — “Jesus, Savior of Humanity”
– In Hoc Signo (vinces) — “In this sign you will conquer,” linked to Constantine’s vision of the cross
– Iesus Hostia Salutis — “Jesus, the saving victim,” highlighting the sacrificial meaning of the Eucharist
In the 15th century, Saint Bernardino of Siena played a major role in spreading devotion to the IHS. The Franciscan preacher presented it as a sign of peace and reconciliation in divided Italian cities. He often carried a tablet showing a radiant sun with the IHS at its center, encouraging people to venerate it as a sign of Christ’s love.
The devotion was approved by Pope Martin V and quickly gained popularity. Later, Saint Ignatius of Loyola adopted IHS as the emblem of the Society of Jesus (the Jesuits). In their seal, the monogram appears within a blazing sun, with a cross above the H and three nails below—symbols of Christ’s Passion and redemption.
In Catholic liturgy, the large host (hostia magna) often bears the IHS at its center. This is not just decorative. It expresses a central truth of the faith: the name of Jesus is inscribed on the Eucharistic offering, which makes present his saving sacrifice.
At the consecration, the bread and wine truly become—according to the doctrine of transubstantiation—the Body and Blood of Christ. The host marked with IHS does not simply represent Jesus; it is Jesus himself: Iesus Hostia Salutis, given for the salvation of the world.
In Christian tradition, the name of Jesus carries saving power:
«“At the name of Jesus every knee should bend, in heaven and on earth and under the earth” (Philippians 2:10)»
This passage underlies the theology of the Holy Name: the name itself is a source of grace and protection. The monogram on the host points to this reality. When the priest speaks the words of consecration, the name of Jesus is sacramentally united with his living presence.
In sacred art and popular devotion, the IHS is often surrounded by rays of light or a sunburst, symbolizing Christ as the “Light of the World” (John 8:12). The cross above recalls his Passion, while the three nails below point to the sacrifice of Calvary.
In just three letters, this symbol brings together language, faith, and theology. It expresses the heart of Christianity: Jesus Christ, true God and true man, given for the salvation of the world.