
The Cross of Otto and Mathilde, Otto-Mathilda Cross, or First Cross of Mathilde (German: ) is a
medieval
In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire a ...
''
crux gemmata
A ''crux gemmata'' (Latin for jewelled cross) is a form of cross typical of Early Christian and Early Medieval art, where the cross, or at least its front side, is principally decorated with jewels. In an actual cross, rather than a painted ima ...
'' (jewelled cross)
processional cross
A processional cross is a crucifix or cross which is carried in Christian processions. Such crosses have a long history: the Gregorian mission of Saint Augustine of Canterbury to England carried one before them "like a standard", according ...
in the
Essen Cathedral Treasury
The Essen Cathedral Treasury (German language, German: Essener Domschatz) is one of the most significant collections of religious artworks in Germany. A great number of items of treasure are accessible to the public in the treasury chamber of E ...
. It was created in the late tenth century and was used on high holidays until recently. It is named after the two persons who appear on the enamel plaque below Christ:
Otto I, Duke of Swabia and Bavaria
Otto I (born 954, died 31 October or 1 November 982) was the Duke of Swabia from 973 and Duke of Bavaria from 976. He was a member of the Ottonian dynasty, the only son of Duke Liudolf of Swabia and his wife Ida, and thus a grandson of the Emperor ...
and his sister,
Mathilde, the abbess of the
Essen Abbey
Essen Abbey (''Stift Essen'') was a community of secular canonesses for women of high nobility that formed the nucleus of modern-day Essen, Germany. It was founded about 845 by the Saxon Altfrid (died 874), later Bishop of Hildesheim and saint ...
. They were grandchildren of the emperor
Otto I
Otto I (23 November 912 – 7 May 973), traditionally known as Otto the Great (german: Otto der Große, it, Ottone il Grande), was East Frankish king from 936 and Holy Roman Emperor from 962 until his death in 973. He was the oldest son of Henr ...
and favourites of their uncle,
Otto II
Otto II (955 – 7 December 983), called the Red (''der Rote''), was Holy Roman Emperor from 973 until his death in 983. A member of the Ottonian dynasty, Otto II was the youngest and sole surviving son of Otto the Great and Adelaide of Ital ...
. The cross is one of the items which demonstrate the very close relationship between the
Liudolfing
The Ottonian dynasty (german: Ottonen) was a Saxon dynasty of German monarchs (919–1024), named after three of its kings and Holy Roman Emperors named Otto, especially its first Emperor Otto I. It is also known as the Saxon dynasty after th ...
royal house and
Essen Abbey
Essen Abbey (''Stift Essen'') was a community of secular canonesses for women of high nobility that formed the nucleus of modern-day Essen, Germany. It was founded about 845 by the Saxon Altfrid (died 874), later Bishop of Hildesheim and saint ...
. Mathilde became Abbess of Essen in 973 and her brother died in 982, so the cross is assumed to have been made between those dates, or a year or two later if it had a memorial function for Otto. Like other objects in Essen made under the patronage of Mathilde, the location of the
goldsmith
A goldsmith is a metalworker who specializes in working with gold and other precious metals. Nowadays they mainly specialize in jewelry-making but historically, goldsmiths have also made silverware, platters, goblets, decorative and servicea ...
's workshop is uncertain, but as well as
Essen
Essen (; Latin: ''Assindia'') is the central and, after Dortmund, second-largest city of the Ruhr, the largest urban area in Germany. Its population of makes it the fourth-largest city of North Rhine-Westphalia after Cologne, Düsseldorf and ...
itself,
Cologne
Cologne ( ; german: Köln ; ksh, Kölle ) is the largest city of the German western state of North Rhine-Westphalia (NRW) and the fourth-most populous city of Germany with 1.1 million inhabitants in the city proper and 3.6 millio ...
has often been suggested, and the enamel plaque may have been made separately in
Trier
Trier ( , ; lb, Tréier ), formerly known in English as Trèves ( ;) and Triers (see also names in other languages), is a city on the banks of the Moselle in Germany. It lies in a valley between low vine-covered hills of red sandstone in the ...
.
Description
The cross is high and wide, with a core made of
oak
An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably ''L ...
. It is a
Latin cross
A Latin cross or ''crux immissa'' is a type of cross in which the vertical beam sticks above the crossbeam, with the three upper arms either equally long or with the vertical topmost arm shorter than the two horizontal arms, and always with a ...
, but the ends of the beams are flared, a feature found in many Ottonian jewelled crosses. Through their double ridges and triangles, the trapezoidal extensions are very close to those of
Cross of Lothair
The Cross of Lothair or Lothair Cross (german: Lotharkreuz) is a '' crux gemmata'' (jewelled cross) processional cross dating from about 1000 AD, though its base dates from the 14th century. It was made in Germany, probably at Cologne. It is an ...
in
Aachen, which is usually dated to around 1000. The front side of the cross is decorated with a
chased gold sheet. A raised border runs around this side of the cross, with
gemstones set in gold
filigree
Filigree (also less commonly spelled ''filagree'', and formerly written ''filigrann'' or ''filigrene'') is a form of intricate metalwork used in jewellery and other small forms of metalwork.
In jewellery, it is usually of gold and silver ...
and separated by
pearl
A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as fossil conulariids. Just like the shell of a mollusk, a pearl is composed of calcium ca ...
s. A fine string of pearls borders the space. The colour and size of the stones on opposite sides match, so that the jewels appear deliberately organised and clear. On the lower end of the vertical cross beam the donation plate in
cloisonné
Cloisonné () is an ancient technique for decorating metalwork objects with colored material held in place or separated by metal strips or wire, normally of gold. In recent centuries, vitreous enamel has been used, but inlays of cut gemstone ...
enamel depicts "Mathild Abba" and "Otto Dux", both holding a standard-like cross.
The body of the suffering
Christ
Jesus, likely from he, יֵשׁוּעַ, translit=Yēšūaʿ, label= Hebrew/Aramaic ( AD 30 or 33), also referred to as Jesus Christ or Jesus of Nazareth (among other names and titles), was a first-century Jewish preacher and religi ...
is beaten from the gold sheet of the background plate. The bulging abdomen and the asymmetrical torso seem similar to the body of the
Gero Cross
The Gero Cross or Gero Crucifix (german: Gero-Kreuz, link=no), of around 965–970, is the oldest large sculpture of the crucified Christ north of the Alps, and has always been displayed in Cologne Cathedral in Germany. It was commissioned by Ger ...
in
Cologne
Cologne ( ; german: Köln ; ksh, Kölle ) is the largest city of the German western state of North Rhine-Westphalia (NRW) and the fourth-most populous city of Germany with 1.1 million inhabitants in the city proper and 3.6 millio ...
, as a result of which Cologne has been suggested as the cross's place of origin.
Trier
Trier ( , ; lb, Tréier ), formerly known in English as Trèves ( ;) and Triers (see also names in other languages), is a city on the banks of the Moselle in Germany. It lies in a valley between low vine-covered hills of red sandstone in the ...
has also been considered in this regard, because the cloisonné plate on the cross might come from the workshop of
Egbert, Archbishop of Trier
Egbert (c. 950 – 9 December 993) was the Archbishop of Trier from 977 until his death.
Egbert was a son of Dirk II, Count of Holland. After being trained in Egmond Abbey, founded and controlled by his family, and at the court of Bruno I, Archb ...
. It is probable that only the enamel was made in Trier, and that the cross was assembled in another place. The
halo
Halo, halos or haloes usually refer to:
* Halo (optical phenomenon)
* Halo (religious iconography), a ring of light around the image of a head
HALO, halo, halos or haloes may also refer to:
Arts and entertainment Video games
* Halo (franchise), ...
on Christ's head reaches to the edge of the cross, while the three gemstones of the halo further emphasise the inclination of the head to the left. Between the feet, placed on the ''
suppedaneum'' (footrest), and the donation plaque, there is the chased image of a snake, which is connected to the
brazen snake of life in
Numbers
A number is a mathematical object used to count, measure, and label. The original examples are the natural numbers 1, 2, 3, 4, and so forth. Numbers can be represented in language with number words. More universally, individual numbers ca ...
21.4–9. According to another interpretation, however, it depicts a
basilisk
In European bestiaries and legends, a basilisk ( or ) is a legendary reptile reputed to be a serpent king, who causes death to those who look into its eyes. According to the ''Naturalis Historia'' of Pliny the Elder, the basilisk of Cyrene ...
which refers to the Messiah as victor over evil in
Psalm
The Book of Psalms ( or ; he, תְּהִלִּים, , lit. "praises"), also known as the Psalms, or the Psalter, is the first book of the ("Writings"), the third section of the Tanakh, and a book of the Old Testament. The title is derived f ...
91.13, "You will tread on the lion and the cobra; you will trample the great lion and the serpent." Above Christ's head there are two cloisonné plates with an inscription in three lines: ''IHC NA / ZARENVS / REX IVDEOR'' ("Jesus of Nazareth, King of the Jews"); the letters IHC stand for the first three letters of the name of Jesus in
Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
.

The back side of the cross is decorated with gilt copper sheeting and has a simpler engraved design, which shows the
four Evangelists on the ends of the cross beams and the
lamb of God
Lamb of God ( el, Ἀμνὸς τοῦ Θεοῦ, Amnòs toû Theoû; la, Agnus Dei, ) is a title for Jesus that appears in the Gospel of John. It appears at John 1:29, where John the Baptist sees Jesus and exclaims, "Behold the Lamb of God wh ...
at the centre. These images are connected by a
Tree of Life
The tree of life is a fundamental archetype in many of the world's mythological, religious, and philosophical traditions. It is closely related to the concept of the sacred tree.Giovino, Mariana (2007). ''The Assyrian Sacred Tree: A Histo ...
.
Iconographic significance

The key to the interpretation and dating of the cross is the donation plate of the cross which has remained unchanged since its creation. On this plate, Otto, Duke of Swabia and Abbess Mathilde are depicted in court dress. The clothing depicted is probably
Sogdia
Sogdia ( Sogdian: ) or Sogdiana was an ancient Iranian civilization between the Amu Darya and the Syr Darya, and in present-day Uzbekistan, Turkmenistan, Tajikistan, Kazakhstan, and Kyrgyzstan. Sogdiana was also a province of the Achaemenid Em ...
n silk which came to the Frankish empire only in the form of gifts from the
Byzantines. Similar fabric is held in the Essen cathedral treasury for wrapping up relics. Since Mathilde was abbess in Essen from 973 and she is not shown in the costume of an abbess, it is assumed in some newer scholarship that her depiction in the court dress of a high noble indicates that she appears here as the sister of Duke Otto and not in her role as abbess. Furthermore, the absence of symbols of a duke, such as a sword or a lance, for Otto suggest that the siblings are depicted as family members and not as dignitaries. Mathilde receives a cross from her brother. Otto holds the cross with two hands, but with outstretched fingers, while Mathilde grips it with a tightly closed fist. Her other hand is raised up, which is ambiguous. This could be taken as a greeting or acceptance gesture directed at Otto or as pointing up out of the image to the crucifixion, as a mediation gesture.
The
donor portrait
A donor portrait or votive portrait is a portrait in a larger painting or other work showing the person who commissioned and paid for the image, or a member of his, or (much more rarely) her, family. ''Donor portrait'' usually refers to the portr ...
, especially the positioning of the siblings' hands, was earlier interpreted as indicating that Otto donated the cross to the abbey which his sister oversaw as abbess. But this makes it odd that Mathilde is not depicted as abbess and that Otto is depicted without ducal insignia. The common hypothesis, advocated by von Pothmann among others, that it was a combined donation of both siblings, may not fit with the fact that the cross depicted on the donor portrait does not match the appearance of the Cross of Otto and Mathilde. This was typically the case in medieval donation pictures.
According to newer literature the depiction of the cross being handed from Otto to Mathilde must therefore be seen symbolically with attention to the family history of the
Liudolfing
The Ottonian dynasty (german: Ottonen) was a Saxon dynasty of German monarchs (919–1024), named after three of its kings and Holy Roman Emperors named Otto, especially its first Emperor Otto I. It is also known as the Saxon dynasty after th ...
dynasty: with the death of Duke Otto on the 31 October 982, there were no further male descendants of Queen
Eadgyth
Edith of England, also spelt Eadgyth or Ædgyth ( ang, Ēadgȳð, german: Edgitha; 910 – 946), a member of the House of Wessex, was a German queen from 936, by her marriage to King Otto I.
Life
Edith was born to the reigning English king E ...
, the first wife of Emperor Otto I. Mathilde, who had a strong sense of family, became manager of the household with his death. As the last member of this branch of the family, she was especially committed to maintaining the memory of the family for her brother. The donor portrait can be seen in this context, symbolising Mathilde's wish to maintain a legacy for the childless Otto. On this basis it is believed that Mathilde donated the cross to the memory of her brother after his death in Otto II's Italian campaign of 982. The donation might have occurred shortly after his death, in 983 or 984, probably contemporaneously with the donation of the more than life size
triumphal cross
A rood or rood cross, sometimes known as a triumphal cross, is a cross or crucifix, especially the large crucifix set above the entrance to the chancel of a medieval church.
Alternatively, it is a large sculpture or painting of the crucifixion ...
to the
collegiate church In Christianity, a collegiate church is a Church (building), church where the daily office of worship is maintained by a college (canon law), college of canon (priest), canons: a non-monastic or secular clergy, "secular" community of clergy, organis ...
of
St. Peter und Alexander in
Aschaffenburg
Aschaffenburg (; South Franconian: ''Aschebersch'') is a town in northwest Bavaria, Germany. The town of Aschaffenburg is not part of the district of Aschaffenburg, but is its administrative seat.
Aschaffenburg belonged to the Archbishopric ...
, in which Otto was buried. The painted frame of this cross matches to the edging of the Cross of Otto and Mathilde.
History
The cross has been located in Essen since its creation, excepting some evacuations during wars and other crises. The ''Inventarium reliquiarum Essendiensium'' of 12 July 1627, the earliest inventory of the Abbey's treasury, allows no certain identification, since it only recorded "two crucifixes decorated with lots of gems and gold, but gilt in copper on the back," a description which matches all four of the processional crosses in the Essen Cathedral Treasury. Likewise, the ''Liber ordinarius'', which regulated the liturgical use of the Abbey treasures, only mentions processional crosses in general terms. Since donated sacral objects were not usually exchanged, it is believed that the cross belonged to the Abbey continuously until the
secularisation
In sociology, secularization (or secularisation) is the transformation of a society from close identification with religious values and institutions toward non-religious values and secular institutions. The ''secularization thesis'' expresses t ...
of the Abbey in 1802. During the
Thirty Years War
The Thirty Years' War was one of the longest and most destructive conflicts in European history, lasting from 1618 to 1648. Fought primarily in Central Europe, an estimated 4.5 to 8 million soldiers and civilians died as a result of battle ...
, the Abbess fled with its treasure to
Cologne
Cologne ( ; german: Köln ; ksh, Kölle ) is the largest city of the German western state of North Rhine-Westphalia (NRW) and the fourth-most populous city of Germany with 1.1 million inhabitants in the city proper and 3.6 millio ...
. In 1794, as the French advanced on Essen, the cathedral treasury was brought to Steele (modern
Essen-Steele) and hidden in the orphanage donated by Abbess
Francisca Christina of Sulzbach.
At secularisation, the Catholic church of
St Johann Baptist took over
Essen Abbey
Essen Abbey (''Stift Essen'') was a community of secular canonesses for women of high nobility that formed the nucleus of modern-day Essen, Germany. It was founded about 845 by the Saxon Altfrid (died 874), later Bishop of Hildesheim and saint ...
and its property, including the cross. During the
Ruhr Uprising of 1920 the whole treasury was taken to
Hildesheim
Hildesheim (; nds, Hilmessen, Hilmssen; la, Hildesia) is a city in Lower Saxony, Germany with 101,693 inhabitants. It is in the district of Hildesheim, about southeast of Hanover on the banks of the Innerste River, a small tributary of the ...
in absolute secrecy, whence it returned in equally secretive circumstances in 1925.
In the
Second World War
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
the cathedral treasury was taken first to
Warstein
Warstein () is a municipality with town status in the district of Soest, in North Rhine-Westphalia, Germany. It is located at the north end of Sauerland.
Geography
Warstein is located north of the Arnsberger Wald (forest) at a brook called Wäs ...
, then to
Albrechtsburg
The Albrechtsburg is a Late Gothic and early Renaissance castle erected from 1471 till about 1495. It is located in the town centre of Meissen in the German state of Saxony. It is situated on a hill above the river Elbe, adjacent to the Meis ...
in
Meissen
Meissen (in German orthography: ''Meißen'', ) is a town of approximately 30,000 about northwest of Dresden on both banks of the Elbe river in the Free State of Saxony, in eastern Germany. Meissen is the home of Meissen porcelain, the Albre ...
and finally to a bunker in
Siegen
Siegen () is a city in Germany, in the south Westphalian part of North Rhine-Westphalia.
It is located in the district of Siegen-Wittgenstein in the Arnsberg region. The university town (nearly 20,000 students in the 2018–2019 winter semeste ...
. After the war it was found there by American troops and, along with the rest of the treasury, the cross went to the State museum in
Marburg
Marburg ( or ) is a university town in the German federal state (''Bundesland'') of Hesse, capital of the Marburg-Biedenkopf district (''Landkreis''). The town area spreads along the valley of the river Lahn and has a population of approx ...
and later to a collection for displaced artworks in
Schloss Dyck in
Rheydt
Rheydt () is a borough of the German city Mönchengladbach, located in the west of North Rhine-Westphalia. Until 1918 and then again from 1933 (due to a split from Mönchengladbach arranged by Joseph Goebbels, who was born there) through 1975 it w ...
. From April to October 1949, the Essen cathedral treasury was displayed in
Brussels
Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
and
Amsterdam
Amsterdam ( , , , lit. ''The Dam on the River Amstel'') is the Capital of the Netherlands, capital and Municipalities of the Netherlands, most populous city of the Netherlands, with The Hague being the seat of government. It has a population ...
and then returned to Essen.
With the establishment of the
Diocese of Essen in 1958 and the promotion of Essen Minster to the status of cathedral, the cross became property of the diocese.
Liturgical significance
Middle Ages
The liturgical use of the Cross of Otto and Mathilde in the Middle Ages is barely reconstructable. In principle, processional crosses were placed at or shortly after the altar and carried in processions. In this, the side with the crucifixion usually pointed forwards, with the members of the procession following Jesus in accordance with
Matthew
Matthew may refer to:
* Matthew (given name)
* Matthew (surname)
* ''Matthew'' (ship), the replica of the ship sailed by John Cabot in 1497
* ''Matthew'' (album), a 2000 album by rapper Kool Keith
* Matthew (elm cultivar), a cultivar of the Chi ...
10.38. The Essen ''Liber Ordinarius'' from the fourteenth century, which draws on earlier texts, records several processions. A processional cross was probably also a symbol of the Sovereign Abbey of Essen, comparable to the
Imperial cross
The Imperial Cross ( la, Cross Imperatoria, German: ''Reichskreuz'') is part of the Imperial Regalia of the Holy Roman Empire. It served as the container for the two "Great Relics of Christ" (''Perveniens Reilquias magna Christi'', ''Großen ...
of the
Imperial regalia
The Imperial Regalia, also called Imperial Insignia (in German ''Reichskleinodien'', ''Reichsinsignien'' or ''Reichsschatz''), are regalia of the Holy Roman Emperor. The most important parts are the Crown, the Imperial orb, the Imperial sce ...
.
A special role is specified in the ''Liber Ordinarius'' for the procession of the
Easter vigil
Easter Vigil, also called the Paschal Vigil or the Great Vigil of Easter, is a liturgy held in traditional Christian churches as the first official celebration of the Resurrection of Jesus. Historically, it is during this liturgy that people are ...
, which passed from Peter's Altar in the
westwerk of the Minster, through the cloister, to the cemetery of the order where the graves were sprinkled with holy water, while the nuns made reference to salvation through the cross in an
antiphon
An antiphon ( Greek ἀντίφωνον, ἀντί "opposite" and φωνή "voice") is a short chant in Christian ritual, sung as a refrain. The texts of antiphons are the Psalms. Their form was favored by St Ambrose and they feature prominen ...
. This role has been attributed to the Cross of Otto and Mathilde by Beuckers on the grounds that it is the oldest and most elaborate of the four processional crosses at Essen.
[Klaus Gereon Beuckers, "Das Otto-Mathilden-Kreuz im Essener Münsterschatz. Überlegungen zu Charakter und Funktion des Stifterbildes" in Katrinette Bodarwé, Thomas Schilp (edd.), ''Herrschaft, Liturgie und Raum. Studien zur mittelalterlichen Geschichte des Frauenstifts Essen.'' Essen 2002, pp.77 f.] A similar procession, known from other convents, symbolised the
resurrection of Christ
The resurrection of Jesus ( grc-x-biblical, ἀνάστασις τοῦ Ἰησοῦ) is the Christianity, Christian belief that God in Christianity, God Resurrection, raised Jesus on the third day after Crucifixion of Jesus, his crucifixion, ...
from the dead and was included in the
Easter
Easter,Traditional names for the feast in English are "Easter Day", as in the '' Book of Common Prayer''; "Easter Sunday", used by James Ussher''The Whole Works of the Most Rev. James Ussher, Volume 4'') and Samuel Pepys''The Diary of Samuel ...
liturgy. It had an intercessory character and was connected to memorial rituals. About the Essen procession, the ''Liber Ordinarius'' dictated that, unlike usual practice, the front side of the cross should look back at the procession. With the Cross of Otto and Mathilde this would have the effect that the siblings depicted on the donor portrait on the front side would be part of the procession, a fraternal prayer from beyond the grave which would be perfect for a donation made in memoriam.
Modern day
Despite its age and art historical significance, the Cross of Otto and Mathilde is no museum piece. Its religious use as a processional cross has never ceased. At the
enthronement
An enthronement is a ceremony of inauguration, involving a person—usually a monarch or religious leader—being formally seated for the first time upon their throne. Enthronements may also feature as part of a larger coronation rite.
...
of the first Bishop of Essen on 1 January 1958, it was carried in front and it was used as a processional cross by him on high feasts and in processions. This practice was changed under his successors on conservation grounds, with a modern processional cross on the model of the Cross of Otto and Mathilde used on these occasions. At the
mass
Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a physical body, until the discovery of the atom and particle physics. It was found that different atoms and different element ...
held for the ordination of the Essen cathedral treasury chamber extension on 15 May 2009, the thousand year old cross served as an altar cross for the treasury.
Notes
Bibliography
* Georg Humann. ''Die Kunstwerke der Münsterkirche zu Essen.'' Schwann, Düsseldorf 1904, pp. 115–160.
*
Lasko, Peter, ''Ars Sacra, 800-1200'', Yale University Press, 1995 (2nd edn.)
* Alfred Pothmann. ''Der Essener Kirchenschatz aus der Frühzeit der Stiftsgeschichte.'' In: Günter Berghaus (ed.): ''Herrschaft, Bildung und Gebet. Gründung und Anfänge des Frauenstifts Essen.'' Klartext-Verlag, Essen 2000, , pp. 135–153.
*
Klaus Gereon Beuckers
Klaus is a German, Dutch and Scandinavian given name and surname. It originated as a short form of Nikolaus, a German form of the Greek given name Nicholas.
Notable persons whose family name is Klaus
*Billy Klaus (1928–2006), American baseba ...
. "Das Otto-Mathilden-Kreuz im Essener Münsterschatz. Überlegungen zu Charakter und Funktion des Stifterbildes." in Katrinette Bodarwé, Thomas Schilp (edd.), ''Herrschaft, Liturgie und Raum. Studien zur mittelalterlichen Geschichte des Frauenstifts Essen'' (= ''Essener Forschungen zum Frauenstift.'' Vol. 1). Klartext-Verlag, Essen 2002, , pp. 51–80.
* Lydia Konnegen. "Verborgene Schätze. Der Essener Münsterschatz in Zeiten des Ruhrkampfes." ''Das Münster am Hellweg''. Vol. 58, 2005, pp. 67–81.
* Klaus Gereon Beuckers, Ulrich Knapp. ''Farbiges Gold. Die ottonischen Kreuze in der Domschatzkammer Essen und ihre Emails.'' Domschatzkammer Essen, Essen 2006, .
* Sonja Hermann. ''Die Inschriften der Stadt Essen'' (= ''
Die Deutschen Inschriften Die Deutschen Inschriften des Mittelalters und der Frühen Neuzeit (DI) (engl.: The German Inscriptions of Medieval and Early Modern Times) is one of the oldest modern endeavours to collect and redact medieval and early modern inscriptions in Europ ...
'', vol. 81). Reichert, Wiesbaden 2011, , pp. 13–14 no. 6 pl. II–III.
{{Crux gemmata
10th-century sculptures
Crux gemmata
Essen Minster
Ottonian sculptures
10th-century Christianity
Processional crosses