The Cross of Mathilde (German: Mathildenkreuz; Latin: Crux Matildae) is an Ottonian processional cross in the crux gemmata style which has been in Essen in Germany since it was made in the 11th century. It is named after Abbess Mathilde (died in 1011) who is depicted as the donor on a cloisonné enamel plaque on the cross's stem. It was made between about 1000, when Mathilde was abbess, and 1058, when Abbess Theophanu died; both were princesses of the Ottonian dynasty. It may have been completed in stages, and the corpus, the body of the crucified Christ, may be a still later replacement. The cross, which is also called the "second cross of Mathilde", forms part of a group along with the Cross of Otto and Mathilde or "first cross of Mathilde" from late in the preceding century, a third cross, sometimes called the Senkschmelz Cross, and the Cross of Theophanu from her period as abbess. All were made for Essen Abbey, now Essen Cathedral, and are kept in Essen Cathedral Treasury, where this cross is inventory number 4.
The Cross of Mathilde is 45 cm (18 in) tall and 30.5 cm (12.0 in) wide and the cross beams are 6.3 cm (2.5 in) wide and 2.2 cm (0.87 in) deep. It consists of an oak core covered in gold sheet. Under the cross is a modern glass ball which serves as a handle. The ends of the Latin cross are flared in a way found in Mathilde's First Cross and the Ottonian Cross of Lothair at Aachen. The narrow sides and reverse of the Cross of Mathilde are covered with gilt copper. On the reverse it is decorated with a punchmarked Agnus Dei which is accompanied by the four Evangelists' symbols. On the obverse there is a crucifix cast in bronze and gilt, with three cavities for holding relics: two in the back and one in the occiput. To the left and right of the crucifix there are enamel roundels with personifications of the Sun and the Moon, surrounded by four pearls each and by filigreework. Above the crucifix is the normal cross inscription in enamel: IHC NAZA/RENVS REX / IVDEORV (Jesus of Nazareth, King of the Jews), above which there is a large red stone surrounded by four pearls. Under the crucifix there is a brown cameo gem of a lion and under that there is an enamel plate with the donor portrait which depicts Mathilde (named) in monastic clothing, kneeling in prayer before the Madonna. The central area with the crucifix, donor portrait, cross inscription, sun, moon and lion cameo is bordered by a strip of alternating enamel plates and stones, each surrounded by four pearls. At the end of each cross beam there are four teardrop-shaped, coloured stones around a central stone. On the right arm, the central stone is a cameo with a female bust looking left. On the left arm it is an intaglio cut in a piece of striped onyx, showing a helmeted soldier in profile, holding a spear.