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Pope Stephen IX (, christened Frederick;  – 29 March 1058) was the
Bishop of Rome The pope is the bishop of Rome and the visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the pope was the sovereign or head of sta ...
and ruler of the
Papal States The Papal States ( ; ; ), officially the State of the Church, were a conglomeration of territories on the Italian peninsula under the direct sovereign rule of the pope from 756 to 1870. They were among the major states of Italy from the 8th c ...
from 3 August 1057 to his death on 29 March 1058. He was a member of the Ardenne-Verdun family, who ruled the
Duchy of Lorraine The Duchy of Lorraine was a principality of the Holy Roman Empire which existed from the 10th century until 1766 when it was annexed by the kingdom of France. It gave its name to the larger present-day region of Lorraine in northeastern France ...
, and started his ecclesiastical career as a
canon Canon or Canons may refer to: Arts and entertainment * Canon (fiction), the material accepted as officially written by an author or an ascribed author * Literary canon, an accepted body of works considered as high culture ** Western canon, th ...
in
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. He was invited to
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by Pope Leo IX, who made him
chancellor Chancellor () is a title of various official positions in the governments of many countries. The original chancellors were the of Roman courts of justice—ushers, who sat at the (lattice work screens) of a basilica (court hall), which separa ...
in 1051 and one of three legates to
Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
in 1054. The failure of their negotiations with Patriarch Michael I Cerularius of Constantinople and Archbishop Leo of Ohrid led to the permanent
East–West Schism The East–West Schism, also known as the Great Schism or the Schism of 1054, is the break of communion (Christian), communion between the Catholic Church and the Eastern Orthodox Church. A series of Eastern Orthodox – Roman Catholic eccle ...
. He continued as chancellor to the next
pope The pope is the bishop of Rome and the Head of the Church#Catholic Church, visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the po ...
, Victor II, and was elected abbot of the
Benedictine The Benedictines, officially the Order of Saint Benedict (, abbreviated as O.S.B. or OSB), are a mainly contemplative monastic order of the Catholic Church for men and for women who follow the Rule of Saint Benedict. Initiated in 529, th ...
monastery of
Montecassino The Abbey of Monte Cassino (today usually spelled Montecassino) is a Catholic, Benedictine monastery on a rocky hill about southeast of Rome, in the Latin Valley. Located on the site of the ancient Roman town of Casinum, it is the first house ...
. Stephen was elected to succeed Victor on 2 August 1057. As pope, Stephen retained the Montecassino abbacy, enforced the
Gregorian Reform The Gregorian Reforms were a series of reforms initiated by Pope Gregory VII and the circle he formed in the papal curia, c. 1050–1080, which dealt with the moral integrity and independence of the clergy. The reforms are considered to be na ...
, and continued Leo IX's efforts to expel Normans from southern Italy. He died in
Florence Florence ( ; ) is the capital city of the Italy, Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in Metropolitan City of Florence, its metropolitan province as of 2025. Florence ...
, apparently poisoned by Romans, while endeavouring to crown his brother
Godfrey the Bearded Godfrey III ( – 1069), called the Bearded, was the eldest son of Gothelo I, Duke of Upper and Lower Lorraine. Biography Disputed succession By inheritance, Godfrey was Count of Verdun and he became Margrave of Antwerp as a vassal of t ...
as
Holy Roman emperor The Holy Roman Emperor, originally and officially the Emperor of the Romans (disambiguation), Emperor of the Romans (; ) during the Middle Ages, and also known as the Roman-German Emperor since the early modern period (; ), was the ruler and h ...
. He remains the most recent pope to take the pontifical name "Stephen".


Family

Christened Frederick, he is a younger brother of
Godfrey the Bearded Godfrey III ( – 1069), called the Bearded, was the eldest son of Gothelo I, Duke of Upper and Lower Lorraine. Biography Disputed succession By inheritance, Godfrey was Count of Verdun and he became Margrave of Antwerp as a vassal of t ...
,
Duke of Lorraine The kings and dukes of Lorraine have held different posts under different governments over different regions, since its creation as the kingdom of Lotharingia by the Treaty of Prüm, in 855. The first rulers of the newly established region were ...
,Patrick Healy, ''The Chronicle of Hugh of Flavigny: Reform and the Investiture Contest in the Late Eleventh Century'', (Ashgate Publishing, 2006), 50. and part of the Ardennes-Verdun dynasty that played a prominent role in the politics of the period. Wattendorff, pp. 3–6. Another older brother, Duke Gothelo II of Lower Lorraine, died in 1046. His younger sister, Regelinde, married Count Albert II of Namur. Another sister, Oda, married Count Lambert II of Louvain. Frederick's youngest sister, Mathilda, was married to Count Palatine Henry I of Lotharingia. The family had strong ties to the abbey of St. Vanne.


Pre-papal career

Frederick held a
canonry Canon () is a Christian title usually used to refer to a member of certain bodies in subject to an canon law, ecclesiastical rule. Originally, a canon was a cleric living with others in a clergy house or, later, in one of the houses within the p ...
in St. Lambert's Cathedral in Liège and then became the
archdeacon An archdeacon is a senior clergy position in the Church of the East, Chaldean Catholic Church, Syriac Orthodox Church, Anglican Communion, St Thomas Christians, Eastern Orthodox Church, Eastern Orthodox churches and some other Christian denomina ...
. In 1049, or perhaps 1051, he met
Pope Leo IX Pope Leo IX (, , 21 June 1002 – 19 April 1054), born Bruno von Egisheim-Dagsburg, was the head of the Catholic Church and ruler of the Papal States from 12 February 1049 to his death in 1054. Leo IX is considered to be one of the most historica ...
, and was invited to Rome. He was appointed
cardinal-deacon A cardinal is a senior member of the clergy of the Catholic Church. As titular members of the clergy of the Diocese of Rome, they serve as advisors to the pope, who is the bishop of Rome and the visible head of the worldwide Catholic Church. Ca ...
of
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by Leo IX. He was also appointed "bibliothecarius et cancellarius", in succession to Odo, the primicerius of Toul, who was named a bishop, and whose latest signature as chancellor is on 16 January 1051. Frederick appears as a signatory to papal documents from 9 March 1051 to 21 December 1053.


Travels

As chancellor, Frederick's duties in preparing and issuing papal documents, especially bulls, required his constant attendance on the pope. He therefore followed Leo in various travels. He participated in the pope's southern journey from May to August 1052; he signed a bull at S. Germano on 20 May 1052, and on 1 July he was in
Benevento Benevento ( ; , ; ) is a city and (municipality) of Campania, Italy, capital of the province of Benevento, northeast of Naples. It is situated on a hill above sea level at the confluence of the Calore Irpino (or Beneventano) and the Sabato (r ...
. He attended Leo in his trip to Germany, where the pope met with
Emperor Henry III Henry III (, 28 October 1016 – 5 October 1056), called the Black () or the Pious, was Holy Roman Emperor from 1046 until his death in 1056. A member of the Salian dynasty, he was the eldest son of Conrad II and Gisela of Swabia. Henry was rais ...
, and attempted to reconcile him with King
Andrew I of Hungary Andrew I the White or the Catholic ( or ; 1015 – before 6 December 1060) was King of Hungary from 1046 to 1060. He descended from a younger branch of the Árpád dynasty. After he spent fifteen years in exile, an extensive revolt by the paga ...
; they were at Bamberg with the emperor, on 18 October, when Frederick signed a
bull A bull is an intact (i.e., not Castration, castrated) adult male of the species ''Bos taurus'' (cattle). More muscular and aggressive than the females of the same species (i.e. cows proper), bulls have long been an important symbol cattle in r ...
, and spent Christmas in
Worms The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...
. During their return journey, Bishop Peter of Le Puy was consecrated at Ravenna on 14 March 1053, and Chancellor Frederick signed the certificate of consecration. The return from Germany had a purpose behind it. Along with Frederick came his brother Godefroy, and numerous troops. Pope Leo, who had negotiated an agreement with the Byzantine catepan of Italy, Argyros, was planning a war against the Normans, which was launched in April 1053. Argyrus proved to be no help at all. The papal forces, filled with Germans, suffered a disastrous defeat at Civitate in the Capitanata on 18 June 1053. The pope and his cardinals were driven out of their refuge in Civitate, and forced to sue for peace. They were seized by the Normans and conveyed to Benevento, where he was installed by 23 June. The pope remained in custody all winter, not setting out for Rome until 12 March 1054. Frederick was with Leo throughout the campaign against the Normans until he was appointed to the embassy to Constantinople. On 28 May 1053, he was at the monastery of
Montecassino The Abbey of Monte Cassino (today usually spelled Montecassino) is a Catholic, Benedictine monastery on a rocky hill about southeast of Rome, in the Latin Valley. Located on the site of the ancient Roman town of Casinum, it is the first house ...
, on 10 June at Sale, and on 18 June at Civitate. In January 1054, the chancellor Frederick was appointed, along with Cardinal Humbert of Silva Candida and Archbishop Pietro of Amalfi, to a legation from Pope Leo IX to the Emperor Constantine Monomachos. Their purpose was to persuade the emperor to come to the aid of the pope, join forces with Henry III, and destroy the Normans. When the legates reached Constantinople, they were hospitably received by the emperor and stayed at the imperial palace for some time. Negotiations between them, Patriarch Michael Cerularius of Constantinople, and Archbishop Leo of Ohrid, however, did not succeed. Pope Leo died during the negotiations, on 19 April 1054. On 16 July 1054, Cardinal Humbert placed the bull of excommunication of the patriarch and archbishop on the high altar of
Hagia Sophia Hagia Sophia (; ; ; ; ), officially the Hagia Sophia Grand Mosque (; ), is a mosque and former Church (building), church serving as a major cultural and historical site in Istanbul, Turkey. The last of three church buildings to be successively ...
. Cardinal Frederick discharged the function of one of the three
papal legate 300px, A woodcut showing Henry II of England greeting the Pope's legate. A papal legate or apostolic legate (from the ancient Roman title '' legatus'') is a personal representative of the Pope to foreign nations, to some other part of the Catho ...
s participating in the events that led to the
East-West Schism East West (or East and West) may refer to: *East–West dichotomy, the contrast between Eastern and Western society or culture Arts and entertainment Books, journals and magazines *'' East, West'', an anthology of short stories written by Salm ...
. When the legates announced their intended departure, the emperor bestowed upon them, in honor of their work, imperial gifts, as well as substantial gifts to the
Holy See The Holy See (, ; ), also called the See of Rome, the Petrine See or the Apostolic See, is the central governing body of the Catholic Church and Vatican City. It encompasses the office of the pope as the Bishops in the Catholic Church, bishop ...
.


Refuge

Frederick apparently brought back a substantial amount of additional money (''pecunia'') with him from Constantinople, sufficient to bring suspicion upon him on the part of Emperor Henry III. In November 1054, the emperor named Gebhard of Dollnstein-Hirschberg as the next
pope The pope is the bishop of Rome and the Head of the Church#Catholic Church, visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the po ...
, and the latter was enthroned as Victor II on 13 April 1055. Frederick was back at the papal chancellery in 1055, but, when the Emperor visited Italy in the summer of 1055, he commanded that Victor arrest Frederick and send him to the German court immediately. Frederick sought refuge at Montecassino late in 1055, where he became a monk of the Order of St. Benedict. To escape the imperial and papal agents, with the abbot's permission, he withdrew to the Island of Termiti in the Adriatic, off the port of Termoli. In August 1056, Pope Victor, harassed by political problems on all sides, travelled to Germany to consult with and gain help from Emperor Henry. He was received by the emperor at Goslar on 8 September, and was with him at Bodfeld on 21 September; but, on 5 October 1056, Henry died. He was buried at Speyer on 21 October. Shortly thereafter, the imperial court was at
Aachen Aachen is the List of cities in North Rhine-Westphalia by population, 13th-largest city in North Rhine-Westphalia and the List of cities in Germany by population, 27th-largest city of Germany, with around 261,000 inhabitants. Aachen is locat ...
, where the pope enthroned Henry III's six-year-old son Henry IV. A reconciliation between the Lorrainers and the imperial family became possible. At a meeting in Cologne in December, the pope reconciled Count Baldwin V of Flanders and Duke Godfrey of Lorraine, Frederick's brother, to Empress Agnes, widow of Henry III and
regent In a monarchy, a regent () is a person appointed to govern a state because the actual monarch is a minor, absent, incapacitated or unable to discharge their powers and duties, or the throne is vacant and a new monarch has not yet been dete ...
for their son Henry IV.


Abbacy

Pope Victor was annoyed by the fact that, following the death of Abbot Richer of Montecassino in December 1055, the papacy had not been consulted in the selection of his successor, Abbot Peter. The situation was made worse by dissensions inside the community, and reports to the pope of various alleged misdoings. Official attempts to justify the traditional procedure of election of abbots did not satisfy the reforming agenda of Roman officials. In May 1057, shortly after
Pentecost Pentecost (also called Whit Sunday, Whitsunday or Whitsun) is a Christianity, Christian holiday which takes place on the 49th day (50th day when inclusive counting is used) after Easter Day, Easter. It commemorates the descent of the Holy Spiri ...
, Cardinal Humbert of Silva Candida, sent as papal legate, began a series of investigations at the monastery. On 22 May he persuaded Abbot Peter to resign. And on 23 May, in a chapter meeting of all of the brothers, presided over by Cardinal Humbert, they began to elect a new abbot; the successful candidate was Cardinal Frederick of Lorraine, who was a monk of Montecassino. Ten days after his election, he and Cardinal Humbert proceeded to the papal court, which was in Tuscany at the time. He was consecrated the thirty-sixth abbot of Montecassino by Pope Victor on 24 June 1057,Ganzer, p. 16. and ruled for a little over ten months. He obtained for his abbey the privilege of being seated ahead of all other abbots at synods, and for the abbots of Montecassino the privilege of wearing the
sandals Sandals are an open type of shoe, consisting of a Sole (shoe), sole held to the wearer's foot by straps going over the instep and around the ankle. Sandals can also have a heel. While the distinction between sandals and other types of footwear ...
and
dalmatic The dalmatic is a long, wide-sleeved tunic, which serves as a liturgical vestment in the Catholic, Lutheran, Anglican, United Methodist, and some other churches. When used, it is the proper vestment of a deacon at Mass, Holy Communion or other ...
at religious ceremonies. On 14 June 1057, Frederick was promoted to the position of cardinal-presbyter of
San Crisogono San Crisogono is a church in Rome (rione Trastevere) dedicated to the martyr Saint Chrysogonus. It was one of the tituli, the first parish churches of Rome, and was probably built in the 4th century under Pope Sylvester I (314–335). T ...
by Victor. Frederick took part in a synod at Arezzo on 23 July, and then began the return journey to Montecassino. He reached Rome, where he took possession of S. Crisogono, his titular church, and took up residence at the Benedictine house, the Pallaria, on the Palatine Hill. Pope Victor died at Arezzo on 28 July, while Frederick was still in Rome.


Papacy

News of Victor's death was brought to Rome by Cardinal Boniface of Albano on 31 July. For the rest of that day, and all the next day, the clergy and populace of Rome discussed what to do next, and specifically whether they should proceed to a papal election. From their discussions, five names emerged as viable candidates: Cardinal Humbert, Cardinal Giovanni of Velletri, Bishop Ottcharius of Perugia, Cardinal Pietro of Tusculum (Frascati), and
Hildebrand Hildebrand is a character from Germanic heroic legend. ''Hildebrand'' is the modern German form of the name: in Old High German it is ''Hiltibrant'' and in Old Norse ''Hildibrandr''. The word ''hild'' means "battle" and ''brand'' means "sword" ...
, the subdeacon of the Roman Church. None of these seemed quite satisfactory, and they compelled Cardinal Frederick to leave his refuge at S. Maria in Pallaria and attend their assembly at the Basilica of S. Peter in vinculis. On 2 August 1057, Frederick was chosen to become the new pope. He took the name Stephen IX. He was escorted to the
Lateran Palace The Apostolic Palace of the Lateran (; ), informally the Lateran Palace (), is an ancient palace of the Roman Empire and later the main pope, papal residence in Rome. Located on Saint John's Square in Lateran on the Caelian Hill, the palace is ...
, and next day escorted to St. Peter's Basilica, where he was crowned.


Church discipline

As pope, Stephen enforced the policies of the
Gregorian Reform The Gregorian Reforms were a series of reforms initiated by Pope Gregory VII and the circle he formed in the papal curia, c. 1050–1080, which dealt with the moral integrity and independence of the clergy. The reforms are considered to be na ...
. He held several synods in Rome from August to November 1057, focusing most vigorously on the importance of
clerical celibacy Clerical celibacy is the requirement in certain religions that some or all members of the clergy be unmarried. Clerical celibacy also requires abstention from deliberately indulging in sexual thoughts and behavior outside of marriage, because thes ...
. He held a synod at the Lateran Basilica in which he remarked that the Eastern Church tradition allowed priests, deacons, and subdeacons to marry, but the Western Church did not.Jaffé, p. 554. Stephen visited the monastery at Montecassino from 30 November 1057 to 10 February 1058. He was still its abbot, and remained so until his death. There he immediately began a program of reform, by every means at his disposal, persuading, exhorting and haranguing the monks to rid themselves of the lax practices that had crept in over the years. He even banned the use of
Ambrosian chant Ambrosian chant (also known as Milanese chant) is the liturgical plainsong, plainchant repertory of the Ambrosian rite of the Roman Catholic Church, distinct from the more widely known Gregorian chant. It is primarily associated with the Roman C ...
, mandating the sole use of the
Gregorian chant Gregorian chant is the central tradition of Western plainsong, plainchant, a form of monophony, monophonic, unaccompanied sacred song in Latin (and occasionally Greek language, Greek) of the Roman Catholic Church. Gregorian chant developed main ...
. In December 1057, he was so ill with "the Roman fever" that he believed he was going to die. In regional politics, Stephen ordered the bishops of England not to seek
consecration Sacred describes something that is dedicated or set apart for the service or worship of a deity; is considered worthy of spiritual respect or devotion; or inspires awe or reverence among believers. The property is often ascribed to objects ( ...
from Archbishop Stigand of Canterbury, who was
excommunicated Excommunication is an institutional act of religious censure used to deprive, suspend, or limit membership in a religious community or to restrict certain rights within it, in particular those of being in communion with other members of the con ...
and usurping the archbishopric.


Secular politics

Stephen was planning for the expulsion of the Normans from southern Italy. At some point in 1057 or 1058, he held a synod in which the citizens of Capua, the capital of the Norman principality, and a cleric named Lando were excommunicated. In order to advance his aims in the south, he decided, at the beginning of 1058, to send a delegation to the new Byzantine Emperor
Isaac I Komnenos Isaac I Komnenos or Comnenus (;  – 1 June 1060) was Byzantine emperor from 1057 to 1059, the first reigning member of the Komnenian dynasty. The son of the general Manuel Erotikos Komnenos, he was orphaned at an early age, and w ...
(1057–1059). The legates were Cardinal Stephen, the Benedictine abbot of the monastery of Ss. Andrea e Gregorio in Rome; Cardinal Mainard, a Benedictine monk of Montecassino; and
Desiderius Desiderius, also known as Daufer or Dauferius (born – died ), was king of the Lombards in northern Italy, ruling from 756 to 774. The Frankish king of renown, Charlemagne, married Desiderius's daughter and subsequently conquered his realm. De ...
, the Benedictine abbot-elect of Montecassino. The delegates left Rome and reached Byzantine-held
Bari Bari ( ; ; ; ) is the capital city of the Metropolitan City of Bari and of the Apulia Regions of Italy, region, on the Adriatic Sea in southern Italy. It is the first most important economic centre of mainland Southern Italy. It is a port and ...
. But there they heard a report that Stephen IX had died, and so the mission was abandoned. After his recovery from his fever, Pope Stephen returned to Rome, and on 8 March 1058, consecrated Bishop Alfanus I of Salerno. In mid-March, he ordered the provost of Montecassino to collect all of the gold and silver of his church and secretly send it immediately to Rome; the pope promised that he would soon return it, with interest. Despite their deep distress, the monks complied, sending the provost with the gold and silver to the pope. The provost was on his way home when the pope called him back and returned Montecassino's treasure. Pope Stephen, however was relieved, by force on the part of the Romans, of the treasure which he had brought to Rome from Constantinople. The pope was planning the elevation of his brother to the imperial throne. For this purpose, and, if the Roman annals are to be believed, out of anger at being plundered, he set out on a journey to Tuscany, planning to crown and lead his brother back to Rome, and from there march against the Normans. Before he departed Rome, the pope summoned a meeting of the bishops, clergy, and people of Rome, and strictly commanded them (''sub districta nimis interdictione constituit'') that if he should die before the return of the subdeacon Hildebrand from the imperial court, they should on no account proceed to the election of a pope, but await Hildebrand's return. As he was travelling from Rome to Florence by way of Arezzo, Pope Stephen conceived of the idea of visiting Abbot John Gualbert at Vallombrosa Abbey. He asked for an interview, and John refused, naming illness as his excuse. The pope asked a second time, and received a second refusal. The pope then moved on to Florence without the two ever having come face to face.


Death and burial

Stephen IX died at
Florence Florence ( ; ) is the capital city of the Italy, Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in Metropolitan City of Florence, its metropolitan province as of 2025. Florence ...
on 29 March 1058. He was attended at his deathbed by Abbot Hugh of Cluny. The Roman annals report that he was given poison on the journey to Florence by an agent of the Romans. The Romans also asserted that Duke Godfrey, the pope's brother, had dispatched 500 troops and money to regain control of Rome, which motivated the Romans to act. Stephen was buried in the Church of Santa Reparata, which was demolished in 1357 to make way for the construction of the new cathedral, Santa Maria del Fiore. During the excavations his tomb was discovered next to the altar of S. Zenobio, and identified by an inscription as well as pontifical insignia with which he had been clothed. The present whereabouts of the remains is unknown. Members of his chapel, which he had brought along from Montecassino, were afraid to return through Rome, and were therefore escorted back to their monastery by Florentine soldiers. Stephen IX is considered by the modern Roman
Catholic Church The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
to have been succeeded by Nicholas II, though others consider his successor to be Benedict X, who came to be regarded as an
antipope An antipope () is a person who claims to be Bishop of Rome and leader of the Roman Catholic Church in opposition to the officially elected pope. Between the 3rd and mid-15th centuries, antipopes were supported by factions within the Church its ...
by some, in the 14th century. Those who rejected the papacy of Benedict X reported a vacancy of the papal throne of nine months and eight days after the death of Stephen IX.Watterich, p. 198, column 2.


Notes and references


Sources

* *Despy, G. (1953). "La carrière lotharingienne du pape Étienne IX," in: ''Revue belge de philologie et d’histoire'', XXXI (1953), pp. 955–972. * * *Kehr, Paulus Fridolinus (1935). ''Italia pontificia. '
Vol. VIII: Regnum Normannorum – Campania
Berlin: Weidmann. (in Latin) *Kelly, J. N. D. and Walsh, M. J. (2010). ''Oxford Dictionary of Popes''. 2nd ed. Oxford: Oxford University Press. pp. 149–150. * * * *Schmale, F.-J. (1963). "Étienne IX," in: ''Dictionnaire d’histoire et de géographie ecclésiastiques'', Vol. XV, Paris 1963, coll. 1198–1203. * * *


External links

*Parisse, Michel (2019)
"Stefano IX, Papa."
''Dizionario Biografico Degli Italiani'', Volume 94 (2019). {{DEFAULTSORT:Stephen 09 House of Limburg 1020s births 1058 deaths 11th-century French clergy Abbots of Monte Cassino Benedictine popes French popes German popes 11th-century popes 11th-century German clergy House of Ardenne–Verdun 11th-century Christian abbots