The Cross of Mathilde 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 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.

Ottonian art is a style in pre-romanesque German art, covering also some works from the Low Countries, northern Italy and eastern France. It was named by the art historian Hubert Janitschek after the Ottonian dynasty which ruled Germany and Northern Italy between 919 and 1024 under the kings Henry I, Otto I, Otto II, Otto III and Henry II. With Ottonian architecture, it is a key component of the Ottonian Renaissance. However, the style neither began nor ended to neatly coincide with the rule of the dynasty. It emerged some decades into their rule and persisted past the Ottonian emperors into the reigns of the early Salian dynasty, which lacks an artistic "style label" of its own. In the traditional scheme of art history, Ottonian art follows Carolingian art and precedes Romanesque art, though the transitions at both ends of the period are gradual rather than sudden. Like the former and unlike the latter, it was very largely a style restricted to a few of the small cities of the period, and important monasteries, as well as the court circles of the emperor and his leading vassals.