Thomas Erastus

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Thomas Erastus
File:Bildnis des Thomas Erastus.jpg
by Tobias Stimmer, 1582
Born September 7, 1524
Baden (in present-day Aargau)
Died December 31, 1583(1583-12-31) (aged 59)
Nationality Swiss
Fields Medicine, theology
Institutions University of Heidelberg
Alma mater University of Basel
University of Bologna
University of Padua
Academic advisors Luca Ghini[1]
Notable students Petrus Ryff
Known for Opposition to Paracelsus
Erastianism (unity between the church and state)

Thomas Erastus (original surname Lüber, Lieber, or Liebler;[2] September 7, 1524 – December 31, 1583) was a Swiss physician and Calvinist theologian. He wrote 100 theses (later reduced to 75) in which he argued that the sins committed by Christians should be punished by the State, and that the Church should not withhold Sacraments as a form of punishment. They were published in 1589, after his death, with the title Explicatio gravissimae quaestionis. His name was later applied to Erastianism.[2]


He was born of poor parents on 7 September 1524, probably at Baden, canton of Aargau, Switzerland. In 1540 he was studying theology at the University of Basel. The plague of 1544 drove him to the University of Bologna and from there to the University of Padua as student of philosophy and medicine. In 1553 he became physician to the count of Henneberg, Saxe-Meiningen, and in 1558 held the same post with the elector-palatine, Otto Heinrich, being at the same time professor of medicine at the University of Heidelberg. His patron's successor, Frederick III, made him a privy Councillor and member of the church consistory in 1559.[3]

In theology he followed Huldrych Zwingli, and at the sacramentarian conferences of Heidelberg (1560) and Maulbronn (1564) he advocated by voice and pen the Zwinglian doctrine of the Lord's Supper, replying in 1565 to the counter-arguments of the Lutheran Johann Marbach, of Strasbourg. He ineffectually resisted the efforts of the Calvinists, led by Caspar Olevian, to introduce the Presbyterian polity and discipline, which were established at Heidelberg in 1570, on the Geneva model.[3]

One of the first acts of the new church system was to excommunicate Erastus on a charge of Socinianism, founded on his correspondence with Transylvania. The ban was not removed until 1575, Erastus declaring his firm adhesion to the doctrine of the Trinity. His position, however, was uncomfortable, and in 1580 he returned to the University of Basel, where in 1583 he was made professor of ethics. He died on 31 December 1583.[3]


Erastus published several pieces focused on medicine, astrology, alchemy, and attacked in his publications the system of Paracelsus. In doing so, he defended medieval tradition in general, and Galen in particular, while conceding some merit to specific points in Paracelsus.[4] His name is permanently associated with a posthumous publication, written in 1568. Its immediate occasion was the disputation at Heidelberg in 1568 for the doctorate of theology by George Withers, an English Puritan (subsequently Archdeacon of Colchester), silenced in 1565 at Bury St Edmunds by Archbishop Parker. Withers had proposed a disputation against vestments, which the university would not allow; his thesis affirming the excommunicating power of the presbytery was sustained.[5]

The Treatise of Erastus (1589) was published by Giacomo Castelvetro, who had married Erastus's widow.[6] It consists of seventy-five Theses, followed by a Confirmatio in six books. An appendix of letters to Erastus by Heinrich Bullinger and Rudolf Gwalther, showed that the Theses, written in 1568, had been circulated in manuscript form. An English translation of the Theses, with a brief account of the life of Erastus (based on Melchior Adam's account), was issued in 1659, entitled The Nullity of Church Censures; it was reprinted as A Treatise of Excommunication (1682) and was revised by Robert Lee, D.D., in 1844.[7]


In his Theses, he argued that the sins committed by Christians should be punished by the State, and that the Church should not withhold Sacraments as a form of punishment. This view is now known as Erastianism.

In his Theses, Erastus explained that sins of professing Christians are to be punished by civil authority, and not by the withholding of sacraments on the part of the clergy. Those holding this view in the Westminster Assembly included John Selden, John Lightfoot, Thomas Coleman and Bulstrode Whitelocke, whose speech in 1645 is appended to Lee's version of the Theses. However, after much controversy, the opposite view was carried, with Lightfoot alone dissenting. The consequent chapter of the Westminster Confession of Faith (Of Church Censures) was not ratified by the English parliament.[7][8]

According to the Catholic Encyclopedia, "The Theses and Confirmatio thesium appeared together in 1589. The central question about which the "Theses" turned was that of excommunication. The term is not, however, used by Erastus in the Catholic sense as excluding the delinquent from the society or membership of the Church. The excommunication to which [it] alludes was the exclusion of those of bad life from participation in the sacraments."[9]


  1. Charles Gunnoe, Thomas Erastus and the Palatinate: A Renaissance Physician in the Second Reformation, Brill, 2010 p. 41.
  2. 2.0 2.1 "Thomas Erastus | Swiss physician and theologian". Retrieved 2016-07-18.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  3. 3.0 3.1 3.2 Chisholm 1911, p. 732.
  4. Allen G. Debus, The English Paracelsians (1965), pp. 37–39.
  5. Chisholm 1911, pp. 732–733.
  6. With the title Explicatio gravissimae quaestionis utrum excommunicatio, quatenus religionem intelligentes et amplexantes, a sacramentorum usu, propter admissum facinus arcet, mandato nitatur divino, an excogitata sit ab hominibus. The work bears the imprint Pesclavii (i.e. Poschiavo in the Grisons) but was printed by John Wolfe in London, where Castelvetri was staying; the name of the alleged printer is an anagram of "Jacobum Castelvetrum." In the Stationers' Register (June 20, 1589) the printing is said to have been allowed by Archbishop Whitgift.
  7. 7.0 7.1 Chisholm 1911, p. 733.
  8. Gunnoe, Charles D. (2010). Thomas Erastus and the Palatinate: A Renaissance Physician in the Second ... pp. 100–110. ISBN 978-9004187924.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  9. Ward, B. "Erastus and Erastianism". The Catholic Encyclopedia. New York: Robert Appleton Company, 1909.


  •  This article incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). [ "Erastus, Thomas" ] Check |ws link in chapter= value (help). Encyclopædia Britannica. 9 (11th ed.). Cambridge University Press. pp. 732–733.CS1 maint: ref=harv (link)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>

Further reading

  • Ruth Wesel-Roth (1959), "Erast, Thomas", Neue Deutsche Biographie (NDB) (in Deutsch), 4, Berlin: Duncker & Humblot, p. 560<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  • Wilhelm Gaß, Albert Schumann (1877), "Erast, Thomas", Allgemeine Deutsche Biographie (ADB) (in Deutsch), 6, Leipzig: Duncker & Humblot, pp. 180–182<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  • Athenae Rauricae (Basel, 1778) pp. 427–30.
  • Auguste Bonnard, Thomas Éraste et la discipline ecclésiastique (1894)
  • Charles Gunnoe, Thomas Erastus and the Palatinate: A Renaissance Physician in the Second Reformation. Leiden: Brill, 2011.
  • G. V. Lechler and R. Stähelin, in Albert Hauck's Realencyklop. für prot. Theol. u. Kirche (1898)
  • Ruth Wesel-Roth, Thomas Erastus: Ein Beitrag zur Geschichte der reformierten Kirche und zur Lehre von der Staatssouveränität [Veröffentlichungen des Vereins für Kirchengeschichte in der evang. Landeskirche Badens 15]. Lahr/Baden: Moritz Schauenberg, 1954.

External links