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{{short description|16th century German theologian}}
{{more footnotes|date=December 2016}}
{{Expand German|Kaspar Schwenckfeld|date=February 2011}}
{{Expand German|Kaspar Schwenckfeld|date=February 2011}}
[[File:Kaspar-Schwenkfeld.jpg|thumb|Kaspar Schwenkfeld]]
[[File:Kaspar-Schwenkfeld.jpg|thumb|A 16th century illustration of Schwenkfeld]]
'''Caspar''' (or '''Kaspar''') '''Schwen(c)kfeld von Ossig''' ({{Audio|GT Caspar Schwenkfeld von Ossig.ogg|listen}}) (1489 or 1490 – 10 December 1561) was a [[Germans|German]] theologian, writer, and preacher who became a [[Protestant Reformer]] and spiritualist. He was one of the earliest promoters of the [[Protestant Reformation]] in [[Silesia]].
'''Caspar''' (or '''Kaspar''') '''Schwen(c)kfeld von Ossig''' ({{Audio|GT Caspar Schwenkfeld von Ossig.ogg|listen}}) (1489 or 1490 – 10 December 1561) was a [[Germans|German]] theologian, writer, physician, naturalist, and preacher who became a [[Protestant Reformer]] and spiritualist. He was one of the earliest promoters of the [[Protestant Reformation]] in [[Silesia]].


Schwenckfeld came to Reformation principles through [[Thomas Müntzer]] and [[Andreas Karlstadt]]. However, he developed his own principles and fell out with [[Martin Luther]] over the eucharistic controversy (1524). He had his own views on the sacraments - the Heavenly Flesh doctrine - developed in close association with his humanist colleague, [[Valentin Krautwald|Valentin Crautwald]] (1465–1545). His followers became a new sect (''see [[Schwenckfelders]]''), which was outlawed in Germany, but his ideas influenced [[Anabaptist|Anabaptism]], [[Pietism]] on mainland Europe, and [[Puritan]]ism in [[England]].
Schwenckfeld came to Reformation principles through [[Thomas Müntzer]] and [[Andreas Karlstadt]]. However, he developed his own principles and fell out with [[Martin Luther]] over the eucharistic controversy (1524). He had his own views on the [[sacraments]], known as the Heavenly Flesh doctrine, that were developed in close association with [[Valentin Krautwald|Valentin Crautwald]], his humanist colleague. His followers became a new sect, which was outlawed in Germany. Its ideas were influenced by [[Anabaptist|Anabaptism]], [[Pietism]] in Europe, and [[Puritanism]] in England.


Many of his followers were persecuted in Europe and thus forced to either convert or flee. Because of this, there are [[Schwenkfelder Church]] congregations in countries such as the [[United States]] (which was then a part of the [[United Kingdom]]).
Many of his followers were persecuted in Europe and thus forced to either convert or flee. Because of this, there are [[Schwenkfelder Church]] congregations in the [[United States]], which was then the [[Thirteen Colonies]] of [[British America]] until American independence was achieved following the [[American Revolutionary War]].


== Early life and education ==
== Life ==
Schwenckfeld was born in [[Ossig]] near Liegnitz, [[Silesia]] now Osiek, near [[Legnica]], Poland, to noble parents in 1489.<ref> Some sources state he was born in 1490, but late in 1489 appears to be the most commonly reported date of his birth. </ref> Between 1505 and 1507, he was a student in [[Cologne]]. In 1507, he enrolled at the [[University of Frankfurt on the Oder]]. Between 1511 and 1523, Schwenckfeld served the [[Duchy of Liegnitz]] as an adviser to Duke Charles I (1511–1515), Duke George I (1515–1518), and Duke Frederick II (1518–1523).


=== Early life ===
==Career==
In 1518 or 1519, Schwenckfeld experienced an awakening that he called a "visitation of God". [[Martin Luther]]'s writings had a deep influence on Schwenckfeld, and he embraced the "[[Lutheranism|Lutheran]]" Reformation and became a student of the scriptures. In 1521, Schwenckfeld began to preach the gospel, and in 1522 won Duke Friedrich II over to Protestantism. He organized a Brotherhood of his converts for the purpose of study and prayer in 1523. In 1525, he rejected Luther's idea of [[real presence]] and came to a spiritual interpretation of the [[Eucharist|Lord's Supper]], which was subsequently rejected by Luther.
Schwenckfeld was born in [[Ossig]] near Liegnitz, [[Silesia]] now [[Osiek, Lubin County|Osiek]], near [[Legnica]], [[Poland]], to noble parents in 1489.<ref>
Some sources give 1490, but late in 1489 appears to be preferable.
</ref> From 1505 to 1507 he was a student in [[Cologne]], and in 1507 enrolled at the [[Viadrina European University|University of Frankfurt on the Oder]]. Between 1511 and 1523, Schwenckfeld served the [[Duchy of Liegnitz]] as an adviser to Duke Charles I (1511–1515), Duke George I (1515–1518), and Duke Frederick II (1518–1523).


Schwenckfeld began to teach that the true believer ate the spiritual body of Christ. He pushed for reformation wherever he went, but also criticized reformers that he thought went to extremes. He emphasized that for one to be a true Christian, one must not change only outwardly but inwardly. Because of the communion and other controversies, Schwenckfeld broke with Luther and followed what some describe as a "middle way". Because of his break from Luther and the [[Magisterial Reformation]], scholars typically categorize Schwenckfeld as a member of the [[Radical Reformation]]. He voluntarily exiled himself from Silesia in 1529 in order to relieve pressure on and embarrassment of his duke. He lived in [[Strasbourg|Strassburg]] from 1529 to 1534 and then in [[Swabia]].
=== From Catholic to Magisterial Reformer to Radical Reformer ===
In 1518 or 1519, Schwenckfeld experienced an awakening that he called a "visitation of God." Luther's writings had a deep influence on Schwenckfeld, and he embraced the "[[Lutheranism|Lutheran]]" Reformation and became a student of the Scriptures. In 1521, Schwenckfeld began to preach the gospel, and in 1522 won Duke Friedrich II over to Protestantism. He organized a ''Brotherhood'' of his converts for the purpose of study and prayer in 1523. In 1525, he rejected Luther's idea of [[Real Presence]] and came to a spiritual interpretation of the [[Eucharist|Lord's Supper]], which was subsequently rejected by Luther. Schwenckfeld began to teach that the true believer ate the spiritual body of Christ. He pushed for reformation wherever he went, but also criticized reformers that he thought went to extremes. He emphasized that for one to be a true Christian, one must not change only outwardly but inwardly. Because of the communion and other controversies, Schwenckfeld broke with Luther and followed what some describe as a "middle way". Because of his break from Luther and the [[Magisterial Reformation]], scholars typically categorize Schwenckfeld as a member of the [[Radical Reformation]]. He voluntarily exiled himself from Silesia in 1529 in order to relieve pressure on and embarrassment of his duke. He lived in [[Strasbourg|Strassburg]] from 1529–1534 and then in [[Swabia]].


=== Teachings ===
===Teachings===
Some of the teachings of Schwenckfeld included opposition to war, secret societies, and oath-taking, that the government had no right to command one's conscience, that regeneration is by grace through inner work of the Spirit, that believers feed on Christ spiritually, and that believers must give evidence of regeneration. He rejected [[infant baptism]], outward church forms, and "denominations". His views on the Eucharist prompted Luther to publish several sermons on the subject in his 1526 ''[[The Sacrament of the Body and Blood of Christ—Against the Fanatics]]''.
Some of the teachings of Schwenckfeld included opposition to war, secret societies, and oath-taking, that the government had no right to command one's conscience, that regeneration is by grace through inner work of the Spirit, that believers feed on Christ spiritually, and that believers must give evidence of regeneration. He rejected [[infant baptism]], outward church forms, and "denominations". His views on the Eucharist prompted Luther to publish several sermons on the subject in his 1526 ''[[The Sacrament of the Body and Blood of Christ—Against the Fanatics]]''.


=== Publications ===
=== Publications ===
In 1540 [[Martin Luther]] expelled Caspar Schwenckfeld from [[Silesia]]. In 1541, Schwenckfeld published the ''Great Confession on the Glory of Christ''. Many considered the writing to be heretical. He taught that Christ had two natures, divine and human, but that he became progressively more divine. He also published a number of works about interpreting the Scriptures during the 1550s, often responding to the rebuttals of the Lutheran Reformer [[Matthias Flacius|Matthias Flacius Illyricus]].<ref>Arbeiten zur Geschichte und Theologie des Luthertums, Neue Folge, Band 5 (Hannover, Lutherisches Verlagshaus: 1984).</ref>
In 1540 Luther expelled Schwenckfeld from Silesia. In 1541, Schwenckfeld published the ''Great Confession on the Glory of Christ''. Many considered the writing to be [[Heresy in Christianity|heretical]]. He taught that Christ had two natures, divine and human, but that he became progressively more divine. He also published a number of works about interpreting the scriptures during the 1550s, often responding to the rebuttals of the Lutheran Reformer [[Matthias Flacius|Matthias Flacius Illyricus]].<ref>Arbeiten zur Geschichte und Theologie des Luthertums, Neue Folge, Band 5 (Hannover, Lutherisches Verlagshaus: 1984).</ref>


Schwenckfeld's ''Theriotropheum Silesiae'' is considered the world's oldest published local faunal list containing a list of the animals of Silesia including 150 species of bird.<ref>{{cite journal|doi=10.1007/s10336-007-0160-2|title=The development of ornithology in central Europe|year=2007|last1=Haffer|first1=J.|s2cid=38874099|journal=Journal of Ornithology|volume=148|pages=125–153}}</ref><ref>{{cite journal|author=Andrejew, Adolf| title=[Kaspar Schwenckfeldt - a Silesian physician, Renaissance student of nature and bibliophile| pages=89-104| journal=Kwartalnik Historii Nauki i Techniki R.|volume=40| year=1995| issue=5|url=http://bazhum.muzhp.pl/media/files/Kwartalnik_Historii_Nauki_i_Techniki/Kwartalnik_Historii_Nauki_i_Techniki-r1995-t40-n3/Kwartalnik_Historii_Nauki_i_Techniki-r1995-t40-n3-s89-104/Kwartalnik_Historii_Nauki_i_Techniki-r1995-t40-n3-s89-104.pdf }}</ref>
Schwenckfeld's ''Theriotropheum Silesiae'' is considered the world's oldest published local faunal list, containing a list of the animals of Silesia, including 150 bird species.<ref>{{cite journal|doi=10.1007/s10336-007-0160-2|title=The development of ornithology in central Europe|year=2007|last1=Haffer|first1=J.|s2cid=38874099|journal=Journal of Ornithology|volume=148|pages=125–153}}</ref><ref>{{cite journal|author=Andrejew, Adolf| title=[Kaspar Schwenckfeldt - a Silesian physician, Renaissance student of nature and bibliophile| pages=89–104| journal=Kwartalnik Historii Nauki I Techniki R.|volume=40| year=1995| issue=5| pmid=11624921|url=http://bazhum.muzhp.pl/media/files/Kwartalnik_Historii_Nauki_i_Techniki/Kwartalnik_Historii_Nauki_i_Techniki-r1995-t40-n3/Kwartalnik_Historii_Nauki_i_Techniki-r1995-t40-n3-s89-104/Kwartalnik_Historii_Nauki_i_Techniki-r1995-t40-n3-s89-104.pdf }}</ref>


=== Death ===
=== Death ===
In 1561, Schwenckfeld became sick with dysentery, and gradually grew weaker until he died in [[Ulm]] on the morning of December 10, 1561. Because of his enemies, the fact of his death and the place of his burial were kept secret.
In 1561, Schwenckfeld became sick with [[dysentery]], and gradually grew weaker until he died in [[Ulm]] on the morning of December 10, 1561. Because of his enemies, the fact of his death and the place of his burial were kept secret.


== Schwenkfelder Church ==
== Schwenkfelder Church ==
[[File:Palm Schwenkfelder Church, Palm PA 02.JPG|300px|thumb|''Schwenkfelder Church'' in [[Palm, Pennsylvania]]]]
{{main|Schwenkfelder Church}}
[[File:Palm Schwenkfelder Church, Palm PA 02.JPG|thumb|Schwenkfelder Church in [[Palm, Pennsylvania]]]]
Schwenckfeld did not organize a separate church during his lifetime, but followers seemed to gather around his writings and sermons. In 1700 there were about 1,500 of them in Lower Silesia. Many fled Silesia under persecution of the Austrian emperor, and some found refuge on the lands of Count [[Nicolaus Ludwig Zinzendorf]] and his [[Herrnhuter Brüdergemeinde]]. These followers became known as Schwenkfelders. A group arrived in Philadelphia in 1731, followed by five more migrations up to 1737. In 1782, the Society of Schwenkfelders was formed, and in 1909 the [[Schwenkfelder Church]] was organized.
Schwenckfeld did not organize a separate church during his lifetime, but followers seemed to gather around his writings and sermons. In 1700, there were about 1,500 of them in [[Lower Silesia]]. Many fled Lower Silesia under persecution of the [[Austria|Austrian]] emperor, and some found refuge on the lands of Count [[Nicolaus Ludwig Zinzendorf]] and his {{Lang|de|[[Herrnhuter Brüdergemeine]]|italic=no}}. These followers became known as Schwenkfelders. A group arrived in Philadelphia in 1731, followed by five more migrations up to 1737. In 1782, the Society of Schwenkfelders was formed, and in 1909 the [[Schwenkfelder Church]] was organized.


Schwenkfelder Church has remained small with approximately 3,000 total members and four churches, including Schwenkfelder Missionary Church in [[Philadelphia]]. Each of its the existing churches are within a {{Convert|50|mi|km|abbr=on}} radius of [[Philadelphia]].
The Schwenkfelder Church has remained small, and currently there are five<ref>
For a number of years there were only five churches, but the ''Schwenkfelder Missionary Church'' was recently formed in Philadelphia.
</ref> churches with about 3,000 members in southeastern Pennsylvania. All of these bodies are within a fifty-mile radius of [[Philadelphia]].


== Schwenkfelder Library & Heritage Center ==
== Schwenkfelder Library & Heritage Center ==
{{Main|Schwenkfelder Library & Heritage Center}}
The [[Schwenkfelder Library & Heritage Center]] is a small museum, library and archives in [[Pennsburg, Pennsylvania]]. It is the only institution dedicated to the preservation and interpretation of the Schwenkfelder story, including Caspar Schwenckfeld, the [[Radical Reformation]], religious toleration, the Schwenkfelders in Europe and America, and the Schwenkfelder Church. The Schwenkfelder Library & Heritage Center has exhibits and programs throughout the year.
Schwenkfelder Library & Heritage Center is a small museum, library and archives in [[Pennsburg, Pennsylvania]]. It is the only institution dedicated to the preservation and interpretation of the history of Schwenkfelder, including Schwenckfeld, the Radical Reformation, religious toleration, the Schwenkfelders in Europe and America, and the Schwenkfelder Church. The Schwenkfelder Library & Heritage Center hosts exhibits and programs throughout the year.


== Notes ==
== Notes ==
Line 43: Line 43:


== References ==
== References ==
* Peter C. Erb: ''Schwenckfeld in his Reformation Setting''. [[Valley Forge]], Pa: Judson Press, 1978.
{{more footnotes|date=December 2016}}
* Edited by [[Chester David Hartranft]] et alii: ''Corpus Schwenkfeldianorum''. Vols. 1-19. Leipzig: [[Breitkopf & Härtel]], 1907–1961.
* [[Peter C. Erb]]: ''Schwenckfeld in his Reformation Setting''. [[Valley Forge]], Pa: Judson Press, 1978.
* Edited by [[Chester David Hartranft]] et alii: ''Corpus Schwenkfeldianorum'' . Vols. 1-19. Leipzig: [[Breitkopf & Härtel]], 1907-1961.
* [[Paul L. Maier]]: ''Caspar Schwenckfeld on the Person and Work of Christ. A Study of Schwenckfeldian Theology at Its Core.'' Assen, The Netherlands: Royal Van Gorcum Ltd, 1959.
* [[Paul L. Maier]]: ''Caspar Schwenckfeld on the Person and Work of Christ. A Study of Schwenckfeldian Theology at Its Core.'' Assen, The Netherlands: Royal Van Gorcum Ltd, 1959.
* [[R. Emmet McLaughlin]]: ''Caspar Schwenckfeld, reluctant radical : his life to 1540.'' New Haven : Yale University Press, 1986 {{ISBN|0-300-03367-2}}
* R. Emmet McLaughlin: ''[[iarchive:casparschwenckfe00mcla|Caspar Schwenckfeld, reluctant radical : his life to 1540]].'' New Haven : Yale University Press, 1986 {{ISBN|0-300-03367-2}}
* [[Rufus M. Jones]]: ''Spiritual reformers in the 16th and 17th centuries''. London: Macmillan, 1914.
* [[Rufus M. Jones]]: ''Spiritual reformers in the 16th and 17th centuries''. London: Macmillan, 1914.
* [[Douglas H. Shantz]]: ''Crautwald and Erasmus. A Study in Humanism and Radical Reform in Sixteenth Century Silesia''. Baden-Baden: [[Valentin Koerner]], 1992.
* Douglas H. Shantz: ''Crautwald and Erasmus. A Study in Humanism and Radical Reform in Sixteenth Century Silesia''. Baden-Baden: Valentin Koerner, 1992.


== External links ==
== External links ==
{{category commons}}
* [http://www.christianitytoday.com/ch/1989/issue21/2112.html?start=1 The Life & Thought of Caspar Schwenckfeld von Ossig]
* [https://www.schwenkfelderchurch.org Official website]
* [http://www.christianitytoday.com/ch/1989/issue21/2112.html?start=1 The Life & Thought of Caspar Schwenckfeld von Ossig] on ''[[Christianity Today]]''
* [http://www.gameo.org/encyclopedia/contents/S388.html Caspar von Schwenckfeld] in ''Global Anabaptist Mennonite Encyclopedia Online''
* [http://www.gameo.org/encyclopedia/contents/S388.html Caspar von Schwenckfeld] in ''Global Anabaptist Mennonite Encyclopedia Online''
* {{Cite EB1911|wstitle=Schwenkfeld, Kaspar}}
* {{Cite EB1911|wstitle=Schwenkfeld, Kaspar}}
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[[Category:15th-century births]]
[[Category:15th-century births]]
[[Category:1561 deaths]]
[[Category:1561 deaths]]
[[Category:16th-century German male writers]]
[[Category:16th-century German Protestant theologians]]
[[Category:16th-century German Protestant theologians]]
[[Category:16th-century German writers]]
[[Category:16th-century male writers]]
[[Category:Deaths from dysentery]]
[[Category:Deaths from dysentery]]
[[Category:European University Viadrina alumni]]
[[Category:German male non-fiction writers]]
[[Category:German male non-fiction writers]]
[[Category:German Protestant Reformers]]
[[Category:German Protestant Reformers]]
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[[Category:Silesian-German people]]
[[Category:Silesian-German people]]
[[Category:Silesian nobility]]
[[Category:Silesian nobility]]
[[Category:Viadrina European University alumni]]

Revision as of 19:15, 9 November 2023

A 16th century illustration of Schwenkfeld

Caspar (or Kaspar) Schwen(c)kfeld von Ossig (listen) (1489 or 1490 – 10 December 1561) was a German theologian, writer, physician, naturalist, and preacher who became a Protestant Reformer and spiritualist. He was one of the earliest promoters of the Protestant Reformation in Silesia.

Schwenckfeld came to Reformation principles through Thomas Müntzer and Andreas Karlstadt. However, he developed his own principles and fell out with Martin Luther over the eucharistic controversy (1524). He had his own views on the sacraments, known as the Heavenly Flesh doctrine, that were developed in close association with Valentin Crautwald, his humanist colleague. His followers became a new sect, which was outlawed in Germany. Its ideas were influenced by Anabaptism, Pietism in Europe, and Puritanism in England.

Many of his followers were persecuted in Europe and thus forced to either convert or flee. Because of this, there are Schwenkfelder Church congregations in the United States, which was then the Thirteen Colonies of British America until American independence was achieved following the American Revolutionary War.

Early life and education

Schwenckfeld was born in Ossig near Liegnitz, Silesia now Osiek, near Legnica, Poland, to noble parents in 1489.[1] Between 1505 and 1507, he was a student in Cologne. In 1507, he enrolled at the University of Frankfurt on the Oder. Between 1511 and 1523, Schwenckfeld served the Duchy of Liegnitz as an adviser to Duke Charles I (1511–1515), Duke George I (1515–1518), and Duke Frederick II (1518–1523).

Career

In 1518 or 1519, Schwenckfeld experienced an awakening that he called a "visitation of God". Martin Luther's writings had a deep influence on Schwenckfeld, and he embraced the "Lutheran" Reformation and became a student of the scriptures. In 1521, Schwenckfeld began to preach the gospel, and in 1522 won Duke Friedrich II over to Protestantism. He organized a Brotherhood of his converts for the purpose of study and prayer in 1523. In 1525, he rejected Luther's idea of real presence and came to a spiritual interpretation of the Lord's Supper, which was subsequently rejected by Luther.

Schwenckfeld began to teach that the true believer ate the spiritual body of Christ. He pushed for reformation wherever he went, but also criticized reformers that he thought went to extremes. He emphasized that for one to be a true Christian, one must not change only outwardly but inwardly. Because of the communion and other controversies, Schwenckfeld broke with Luther and followed what some describe as a "middle way". Because of his break from Luther and the Magisterial Reformation, scholars typically categorize Schwenckfeld as a member of the Radical Reformation. He voluntarily exiled himself from Silesia in 1529 in order to relieve pressure on and embarrassment of his duke. He lived in Strassburg from 1529 to 1534 and then in Swabia.

Teachings

Some of the teachings of Schwenckfeld included opposition to war, secret societies, and oath-taking, that the government had no right to command one's conscience, that regeneration is by grace through inner work of the Spirit, that believers feed on Christ spiritually, and that believers must give evidence of regeneration. He rejected infant baptism, outward church forms, and "denominations". His views on the Eucharist prompted Luther to publish several sermons on the subject in his 1526 The Sacrament of the Body and Blood of Christ—Against the Fanatics.

Publications

In 1540 Luther expelled Schwenckfeld from Silesia. In 1541, Schwenckfeld published the Great Confession on the Glory of Christ. Many considered the writing to be heretical. He taught that Christ had two natures, divine and human, but that he became progressively more divine. He also published a number of works about interpreting the scriptures during the 1550s, often responding to the rebuttals of the Lutheran Reformer Matthias Flacius Illyricus.[2]

Schwenckfeld's Theriotropheum Silesiae is considered the world's oldest published local faunal list, containing a list of the animals of Silesia, including 150 bird species.[3][4]

Death

In 1561, Schwenckfeld became sick with dysentery, and gradually grew weaker until he died in Ulm on the morning of December 10, 1561. Because of his enemies, the fact of his death and the place of his burial were kept secret.

Schwenkfelder Church

Schwenkfelder Church in Palm, Pennsylvania

Schwenckfeld did not organize a separate church during his lifetime, but followers seemed to gather around his writings and sermons. In 1700, there were about 1,500 of them in Lower Silesia. Many fled Lower Silesia under persecution of the Austrian emperor, and some found refuge on the lands of Count Nicolaus Ludwig Zinzendorf and his Herrnhuter Brüdergemeine. These followers became known as Schwenkfelders. A group arrived in Philadelphia in 1731, followed by five more migrations up to 1737. In 1782, the Society of Schwenkfelders was formed, and in 1909 the Schwenkfelder Church was organized.

Schwenkfelder Church has remained small with approximately 3,000 total members and four churches, including Schwenkfelder Missionary Church in Philadelphia. Each of its the existing churches are within a 50 mi (80 km) radius of Philadelphia.

Schwenkfelder Library & Heritage Center

Schwenkfelder Library & Heritage Center is a small museum, library and archives in Pennsburg, Pennsylvania. It is the only institution dedicated to the preservation and interpretation of the history of Schwenkfelder, including Schwenckfeld, the Radical Reformation, religious toleration, the Schwenkfelders in Europe and America, and the Schwenkfelder Church. The Schwenkfelder Library & Heritage Center hosts exhibits and programs throughout the year.

Notes

  1. ^ Some sources state he was born in 1490, but late in 1489 appears to be the most commonly reported date of his birth.
  2. ^ Arbeiten zur Geschichte und Theologie des Luthertums, Neue Folge, Band 5 (Hannover, Lutherisches Verlagshaus: 1984).
  3. ^ Haffer, J. (2007). "The development of ornithology in central Europe". Journal of Ornithology. 148: 125–153. doi:10.1007/s10336-007-0160-2. S2CID 38874099.
  4. ^ Andrejew, Adolf (1995). "[Kaspar Schwenckfeldt - a Silesian physician, Renaissance student of nature and bibliophile" (PDF). Kwartalnik Historii Nauki I Techniki R. 40 (5): 89–104. PMID 11624921.

References

External links