Arma Christi

Arma Christi ("Weapons of Christ"), or the Instruments of the Passion, are the objects associated with Jesus' Passion in Christian symbolism and art. They are seen as arms in the sense of heraldry, and also as the weapons Christ used to achieve his conquest over Satan. There is a group, at a maximum of about 20 items, which are frequently used in Christian art, especially in the Late Middle Ages. Typically they surround either a cross or a figure of Christ of the Man of Sorrows type, either placed around the composition, or held by angels.

The prime member, the Cross, had been introduced to Christian art in the 4th century as the crux invicta, a symbol of victory. As a group they have a long tradition in iconography, dating back to the 9th century; the Utrecht Psalter of 830 is an example, though the only one from the Early Middle Ages known to Gertrud Schiller. This reflected an increase in theological interest in the sufferings of Christ at the time. The Middle English poem Arma Christi, which appeared before the end of the 14th century, exists in fifteen manuscripts, attesting to its popularity, of which seven are engrossed in highly unusual scroll form, designed to be displayed in church as a pictorial aid to public devotion; manuscripts of Arma Christi are generally accompanied by illustrations of the instruments, viewing of which, according to the texts, granted indulgence of a certain number of days in Purgatory to come.

Relics of the most important items had a long history, dating back to the Empress Helena's discovery of the True Cross in the early 4th century. Relics claiming to be the Holy Lance, Holy Sponge, Holy Chalice and nails from the cross were all venerated well before 1000, and were to proliferate in later centuries. There was a wave of new relics in the West at the time of the Crusades, and a further wave as the Instruments became featured more prominently in devotional literature and practices in the 14th century.

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