Marsilius of Padua

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File:Marsilius, Defensor pacis, Paris, Lat. 14620.jpg
Miniature on the first page of a luxury manuscript of the Defensor pacis (15th century). Marsilius is shown presenting a copy to the Emperor

Marsilius of Padua (Italian: Marsilio or Marsiglio da Padova; born Marsilio dei Mainardini or Marsilio Mainardini; c. 1275 – c. 1342) was an Italian scholar, trained in medicine, who practiced a variety of professions. He was also an important 14th-century political figure. His political treatise Defensor pacis (The Defender of Peace), an attempt to refute papalist claims to a "plenitude of power" in affairs of both church and state, is seen by some authorities as the most revolutionary political treatise written in the later Middle Ages. It is one of the first examples of a trenchant critique of caesaropapism in Western Europe.[1]

Early years

Marsilius was born in Padua, an important Italian city, circa 1275-1280. He probably studied medicine at the University of Padua[2] and later went to the University of Paris, where he became a devoted admirer of Aristotle, whom he called 'the divine philosopher".[3] He served as rector of the University of Paris in 1313.

Political theory and later years

Marsilius wrote Defensor pacis in 1324.[4] This treatise was written in the context of a power struggle between Pope John XXII and Louis of Bavaria (or Ludwig of Bavaria), the elected candidate for Holy Roman Emperor. Louis' policies in the Italian peninsula, where the Empire had important territories, threatened papal territorial sovereignty. In 1323 Louis had sent an army to Italy to protect Milan against the powerful Kingdom of Naples. Naples, along with France, was a strong ally of John XXII. John excommunicated Louis and demanded that he relinquish his claim to the imperial crown. Louis responded to John XXII with fresh provocations.

In Defensor pacis, Marsilius sought to demonstrate, by arguments from reason (in Dictio I of the text) and by argument from authority (in Dictio II) the independence of the Holy Roman Empire from the Papacy and the emptiness of the prerogatives alleged to have been usurped by the Roman pontiffs. A number of Marsilius's views were declared to be heretical by Pope John XXII in 1327.[4]

Most of Defensor pacis is devoted to theology. Relying heavily on Scripture, Marsilius seeks to show that Jesus did not claim to possess any temporal power and that he did not intend his church to exercise any.[5] On the contrary, Scripture teaches that the church should be thoroughly subordinate to the state in both secular and spiritual matters. All authority in the church lies with the whole body of the faithful, the secular ruler who acts as the people's representative, and general councils called by the secular ruler.[6] Some of Marsilius's arguments on these themes had a marked influence during the Reformation.[7]

Today, Marsilius's Defensor pacis is best remembered not for its theology but for its political philosophy and legal theory. Marsilius agrees with Aristotle that the purpose of government is the rational fulfillment of humans' natural desire for a "sufficient life".[8] However, he goes beyond Aristotle in embracing a form of republicanism that views the people as the only legitimate source of political authority. Sovereignty lies with the people, and the people should elect, correct, and, if necessary, depose its political leaders.[7] Democracy, Marsilius argues, is the best form of government because it tends to produce the wisest laws, protects the common benefit, promotes "sufficiency of life", and produces laws that are most likely to be obeyed.[9]

Marsilius and John of Jandun, who has sometimes been credited as a co-author of Defensor pacis, left France for Louis' court in Bavaria. Louis admitted Marsilius and John to his circle. Others were also under his protection, including Michael of Cesena and the philosopher William of Ockham, an advocate of an early form of church and state separation. In 1326, Marsilius accompanied Louis to Italy, where he preached or circulated written attacks against the pope. The Lord of Milan Galeazzo I Visconti, suspected of conspiring with John XXII, was deposed and Louis was crowned King of Italy in Milan in 1327.

In January 1328 Louis entered Rome and had himself crowned emperor by the aged senator Sciarra Colonna, called captain of the Roman people. Three months later, Louis published a decree declaring "Jacque de Cahors"—Pope John XXII—deposed on grounds of heresy. He then installed the Franciscan Pietro Rainalducci as Nicholas V. Nicholas was deposed upon Louis's departure from Rome in 1329.

In Bavaria, as imperial vicar, Marsilius persecuted the clergy who had remained faithful to John XXII. In recompense for his services, he was appointed archbishop of Milan,[10] and John of Jandun obtained from Louis IV the bishopric of Ferrara.

Marsilius also composed a treatise De translatione [Romani] imperii, which some authorities consider is a rearrangement of a similar work by Landolfo Colonna called De jurisdictione imperatoris in causa matrimoniali. This work, and Marsilius's variation, sought to justify the exclusive jurisdiction of the emperor in matrimonial affairs: Louis of Bavaria had recently annulled the marriage of the son of the King of Bohemia.


Marsilius died in Munich around 1342, still unreconciled to the Church.


Some authorities consider Defensor pacis one of the most important political and religious works of fourteenth-century Europe. In the Defensor minor, Marsilius completed and elaborated on different points in the doctrine laid down in the Defensor pacis. He dealt here with problems concerning ecclesiastical jurisdiction, penance, indulgences, crusades and pilgrimages, vows, excommunication, the general church council, marriage and divorce, and unity with the Greek Orthodox Church. In this work he even more clearly articulates imperial supremacy over the Church.[11]




  1. Hahn, Scott; Wiker, Benjamin (2013). Politicizing the Bible: The Roots of Historical Criticism and the Secularization of Scripture 1300-1700. Chapter 2: "The First Cracks of Secularism: Marsilius of Padua and William of Ockham": Herder & Herder. pp. 17–59 passim. Unknown parameter |name-list-style= ignored (help)CS1 maint: location (link)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. Alan Gewirth, "Marsilius of Padua," in Paul Edwards, ed., The Encyclopedia of Philosophy, vol. 5. New York: Macmillan, 1967, p. 166.
  3. Marsilius of Padua, The Defender of Peace. Translated by Alan Gewirth. New York: Harper & Row, 1967, p. 38.
  4. 4.0 4.1 Lee, Hwa-Yong, Political Representation in the Later Middle Ages: Marsilius in Context (New York etc., Lang, 2008)
  5. Marsilius of Padua, Defensor Pacis, pp. 113-126.
  6. Marsilius of Padua, Defender of Peace, Discourse II.
  7. 7.0 7.1 Gewirth, "Marsilius of Padua," p. 167.
  8. Marsilius of Padua, Defensor Pacis, p. 13.
  9. Marsilius of Padua, The Defender of Peace, pp. 46-47.
  10. Wikisource-logo.svg Herbermann, Charles, ed. (1913). [ "Marsilius of Padua" ] Check |ws link in chapter= value (help). Catholic Encyclopedia. New York: Robert Appleton Company.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  11. Lee, Hwa-Yong, Political Representation in the Later Middle Ages: Marsilius in Context (New York etc., Lang, 2008)


Brampton, C. Kenneth (1922). "Marsiglio of Padua: Part I. Life". The English Historical Review. XXXVII (148): 501–15. JSTOR 552199.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
Dyson, Robert W. (2003). Normative Theories of Society and Government in Five Medieval Thinkers: St. Augustine, John of Salisbury, Giles of Rome, Thomas Aquinas and Marsilius of Padua. Lewiston: Edwin Mellen Press.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
Kaye, Joel (2013). "Equalization in the Body and the Body Politic: From Galen to Marsilius of Padua". Mélanges de l'École Française de Rome. Moyen Âge. CXXV (2): 1–38. doi:10.4000/mefrm.1252.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
Lewis, Ewart (1963). "The "Positivism" of Marsiglio of Padua". Speculum. XXXVIII (4): 541–82. JSTOR 2851655.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
Maiolo, Francesco (2007). Medieval Sovereignty: Marsilius of Padua and Bartolus of Saxoferrato. Delft: Eburon Academic Publishers.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
Nederman, Cary J. (1995). "From Defensor pacis to Defensor minor: The Problem of Empire in Marsiglio of Padua". History of Political Thought. XVI (3): 313–29. JSTOR 26215874.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
Previté-Orton, C. W. (1923). "Marsiglio of Padua: Part II. Doctrines". The English Historical Review. XXXVIII (149): 1–18. JSTOR 551889.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>

Further reading

  • The Defender of Peace (Cambridge University Press, 2005).
  • Writings on the Empire: Defensor minor and De translatione imperii (Cambridge University Press, 1993).
  • Wikisource-logo.svg Herbermann, Charles, ed. (1913). [ "Marsilius of Padua" ] Check |ws link in chapter= value (help). Catholic Encyclopedia. New York: Robert Appleton Company.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles> This article incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). [ "Marsilius of Padua" ] Check |ws link in chapter= value (help). Encyclopædia Britannica. 17 (11th ed.). Cambridge University Press. pp. 775–776.CS1 maint: ref=harv (link)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>