
The Protestant Union (german: Protestantische Union), also known as the Evangelical Union, Union of Auhausen, German Union or the Protestant Action Party, was a coalition of
Protestant
Protestantism is a Christian denomination, branch of Christianity that follows the theological tenets of the Reformation, Protestant Reformation, a movement that began seeking to reform the Catholic Church from within in the 16th century agai ...
German states. It was formed on 14 May 1608 by
Frederick IV, Elector Palatine
Frederick IV, Elector Palatine of the Rhine (german: Kurfürst Friedrich IV. von der Pfalz; 5 March 1574 – 19 September 1610), only surviving son of Louis VI, Elector Palatine and Elisabeth of Hesse, called "Frederick the Righteous" (german ...
in order to defend the rights, land and safety of each member. It included both
Calvinist
Calvinism (also called the Reformed Tradition, Reformed Protestantism, Reformed Christianity, or simply Reformed) is a major branch of Protestantism that follows the theological tradition and forms of Christian practice set down by John Ca ...
and
Lutheran
Lutheranism is one of the largest branches of Protestantism, identifying primarily with the theology of Martin Luther, the 16th-century German monk and Protestant Reformers, reformer whose efforts to reform the theology and practice of the Cathol ...
states, and dissolved in 1621.
The union was formed following two events. Firstly, the
Holy Roman Emperor Rudolf II
Rudolf II (18 July 1552 – 20 January 1612) was Holy Roman Emperor (1576–1612), King of Hungary and Croatia (as Rudolf I, 1572–1608), King of Bohemia (1575–1608/1611) and Archduke of Austria (1576–1608). He was a member of the Hou ...
and
Bavarian Duke Maximilian I reestablished
Catholic
The Catholic Church, also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.3 billion baptized Catholics Catholic Church by country, worldwide . It is am ...
ism in
Donauwörth
Donauwörth () is a town and the capital of the Donau-Ries district in Swabia, Bavaria, Germany. It is said to have been founded by two fishermen where the rivers Danube (Donau) and Wörnitz meet. The city is part of the scenic route called "Rom ...
in 1607. Secondly, by 1608, a majority of the
Imperial Diet had decided that the renewal of the 1555
Peace of Augsburg should be conditional upon the restoration of all church land appropriated since 1552. The Protestant princes met in
Auhausen, and formed a coalition of Protestant states under the leadership of Frederick IV on 14 May 1608. In response, the
Catholic League organized the following year, headed by Duke Maximilian.
Members of the Protestant Union included the
Palatinate
Palatinate or county palatine may refer to:
*the territory or jurisdiction of a count palatine
United Kingdom and Ireland
*County palatine in England and Ireland
* Palatinate (award), student sporting award of Durham University
*Palatinate (col ...
,
Neuburg,
Württemberg
Württemberg ( ; ) is a historical German territory roughly corresponding to the cultural and linguistic region of Swabia. The main town of the region is Stuttgart.
Together with Baden and Hohenzollern, two other historical territories, Wür ...
,
Baden-Durlach
The Margraviate of Baden-Durlach was an early modern territory of the Holy Roman Empire, in the upper Rhine valley, which existed from 1535 to 1771. It was formed when the Margraviate of Baden was split between the sons of Margrave Christopher ...
,
Ansbach
Ansbach (; ; East Franconian: ''Anschba'') is a city in the German state of Bavaria. It is the capital of the administrative region of Middle Franconia. Ansbach is southwest of Nuremberg and north of Munich, on the river Fränkische Rez ...
,
Bayreuth,
Anhalt
Saxony-Anhalt (german: Sachsen-Anhalt ; nds, Sassen-Anholt) is a state of Germany, bordering the states of Brandenburg, Saxony, Thuringia and Lower Saxony. It covers an area of
and has a population of 2.18 million inhabitants, making it the ...
,
Zweibrücken
Zweibrücken (; french: Deux-Ponts, ; Palatinate German: ''Zweebrigge'', ; literally translated as "Two Bridges") is a town in Rhineland-Palatinate, Germany, on the Schwarzbach river.
Name
The name ''Zweibrücken'' means 'two bridges'; olde ...
,
Oettingen
Oettingen in Bayern ( Swabian: ''Eadi'') is a town in the Donau-Ries district, in Swabia, Bavaria, Germany. It is situated northwest of Donauwörth, and northeast of Nördlingen.
Geography
The town is located on the river Wörnitz, a tributar ...
,
Hesse-Kassel
The Landgraviate of Hesse-Kassel (german: Landgrafschaft Hessen-Kassel), spelled Hesse-Cassel during its entire existence, was a state in the Holy Roman Empire that was directly subject to the Emperor. The state was created in 1567 when the Lan ...
,
Brandenburg
Brandenburg (; nds, Brannenborg; dsb, Bramborska ) is a state in the northeast of Germany bordering the states of Mecklenburg-Vorpommern, Lower Saxony, Saxony-Anhalt, and Saxony, as well as the country of Poland. With an area of 29,480 square ...
, and the
free cities of
Ulm
Ulm () is a city in the German state of Baden-Württemberg, situated on the river Danube on the border with Bavaria. The city, which has an estimated population of more than 126,000 (2018), forms an urban district of its own (german: link=no, ...
,
Strasbourg,
Nuremberg
Nuremberg ( ; german: link=no, Nürnberg ; in the local East Franconian dialect: ''Nämberch'' ) is the second-largest city of the German state of Bavaria after its capital Munich, and its 518,370 (2019) inhabitants make it the 14th-largest ...
,
Rothenburg Rothenburg is a German language placename and refers to:
Places
*Rothenburg ob der Tauber, Bavaria, Germany
*Rothenburg, Oberlausitz, Saxony, Germany
*Rothenburg, Saxony-Anhalt, Saxony-Anhalt, Germany
*Rothenburg, Switzerland, Canton of Lucerne, S ...
,
Windsheim
Bad Windsheim ( East Franconian: ''Winsa'') is a small historic town in Bavaria, Germany with a population of almost 12,000. It lies in the district Neustadt an der Aisch-Bad Windsheim, west of Nuremberg. In the Holy Roman Empire, Windsheim held ...
,
Schweinfurt
Schweinfurt ( , ; ) is a city in the district of Lower Franconia in Bavaria, Germany. It is the administrative centre of the surrounding district (''Landkreis'') of Schweinfurt and a major industrial, cultural and educational hub. The urban a ...
,
Weissenburg,
Nördlingen
Nördlingen (; Swabian: ''Nearle'' or ''Nearleng'') is a town in the Donau-Ries district, in Swabia, Bavaria, Germany, with a population of approximately 20,674. It is located approximately east of Stuttgart, and northwest of Munich. It was bu ...
,
Schwäbisch Hall
Schwäbisch Hall (; "Swabian Hall"; from 1802 until 1934 and colloquially: ''Hall'' ) is a city in the German state of Baden-Württemberg located in the valley of the Kocher river, the longest tributary (together with its headwater Lein) of th ...
,
Heilbronn
Heilbronn () is a city in northern Baden-Württemberg, Germany, surrounded by Heilbronn District. With over 126,000 residents, it is the sixth-largest city in the state.
From the late Middle Ages, it developed into an important trading centre. A ...
,
Memmingen
Memmingen (; Swabian: ''Memmenge'') is a town in Swabia, Bavaria, Germany. It is the economic, educational and administrative centre of the Danube-Iller region. To the west the town is flanked by the Iller, the river that marks the Baden-Wür ...
,
Kempten
Kempten (, (Swabian German: )) is the largest town of Allgäu, in Swabia, Bavaria, Germany. The population was about 68,000 in 2016. The area was possibly settled originally by Celts, but was later taken over by the Romans, who called the town '' ...
,
Landau
Landau ( pfl, Landach), officially Landau in der Pfalz, is an autonomous (''kreisfrei'') town surrounded by the Südliche Weinstraße ("Southern Wine Route") district of southern Rhineland-Palatinate, Germany. It is a university town (since 1990 ...
,
Worms Worms may refer to:
*Worm, an invertebrate animal with a tube-like body and no limbs
Places
*Worms, Germany, a city
** Worms (electoral district)
* Worms, Nebraska, U.S.
*Worms im Veltlintal, the German name for Bormio, Italy
Arts and entertai ...
,
Speyer
Speyer (, older spelling ''Speier'', French: ''Spire,'' historical English: ''Spires''; pfl, Schbaija) is a city in Rhineland-Palatinate in Germany with approximately 50,000 inhabitants. Located on the left bank of the river Rhine, Speyer li ...
,
Aalen
Aalen () is a former Free Imperial City located in the eastern part of the German state of Baden-Württemberg, about east of Stuttgart and north of Ulm. It is the seat of the Ostalbkreis district and is its largest town. It is also the la ...
and
Giengen
Giengen (; full name: Giengen an der Brenz; Swabian: ''Gẽänge'') is a former Free Imperial City in eastern Baden-Württemberg near the border with Bavaria in southern Germany. The town is located in the district of Heidenheim at the eastern e ...
.
[; .]
However, the Protestant Union was weakened from the start by the non-participation of several powerful German Protestant rulers, notably the
Elector of Saxony
The Electorate of Saxony, also known as Electoral Saxony (German: or ), was a territory of the Holy Roman Empire from 1356–1806. It was centered around the cities of Dresden, Leipzig and Chemnitz.
In the Golden Bull of 1356, Emperor Charles ...
. The Union was also beset by internal strife between its Lutheran and Calvinist members.
In 1619,
Frederick V of the Palatinate accepted the crown of
Bohemia in opposition to Holy Roman Emperor
Ferdinand II. On 3 July 1620 the Protestant Union signed the Treaty of Ulm (german: Ulmer Vertrag), declaring neutrality and declining to support Frederick V. In January 1621, Ferdinand II imposed an
imperial ban
The imperial ban (german: Reichsacht) was a form of outlawry in the Holy Roman Empire. At different times, it could be declared by the Holy Roman Emperor, by the Imperial Diet, or by courts like the League of the Holy Court (''Vehmgericht'') or ...
upon Frederick V and moved his right to elect an emperor to Maximilian. Electoral Palatinate also lost the
Upper Palatinate
The Upper Palatinate (german: Oberpfalz, , ) is one of the seven administrative districts of Bavaria, Germany, and is located in the east of Bavaria.
Geography
The Upper Palatinate is a landscape with low mountains and numerous ponds and lakes ...
to Bavaria. The Protestant Union met in
Heilbronn
Heilbronn () is a city in northern Baden-Württemberg, Germany, surrounded by Heilbronn District. With over 126,000 residents, it is the sixth-largest city in the state.
From the late Middle Ages, it developed into an important trading centre. A ...
in February and formally protested Ferdinand's actions. He ignored this complaint and ordered the Protestant Union to disband its army. The members of the union complied with Ferdinand's demand under the Mainz accord in May, and on 14 May 1621 it was formally dissolved.
A new separate union without connection to this one emerged twelve years later, the
Heilbronn League
The Heilbronn League was formed in the Free Imperial City of Heilbronn, on 23 April 1633, during the Thirty Years' War. Led by Sweden, it brought together various Protestant states in western and northern Germany. It was supported by Saxo ...
. It allied some Protestant states in western, central and southern Germany, and fought against the Holy Roman Emperor under the guidance of Sweden and France, which were at the same time parties to that league.
Guidelines of the Protestant Union

Intending to strengthen the security provided by the
Peace of Augsburg, Protestants formed the union in 1608. Its leaders created guidelines and agreements to live by as follows:
#Each member shall keep in good faith with the order and their heirs, land and people, and no one shall enter into any other alliance.
#Each member of the union should keep a secret correspondence effectively to inform each other of all dangerous and offensive affairs which may threaten each other's heirs, land and people, and to this purpose each will keep in good contact with one another.
#Whenever important matters arise that concern the well-being of the union, the members of the union will help each other with faithful advice in order to uphold each and every one as much as possible.
#The wish of the union in matters concerning the liberties and high jurisdictions of the German Electors and Estates should be presented and pressed at subsequent Imperial and Imperial Circle assemblies, and not merely left to secret correspondence with each other.
#The union shall not affect our disagreement on several points of religion, but that notwithstanding these, we have agreed to support each other. No member is to allow an attack on any other in books or through the pulpit, nor give cause for any breach of the peace, while at the same time leaving untouched the theologian's rights of disputation to affirm the word of God.
#If one of the members of the union is attacked, the remaining members of the union shall immediately come to his aid with all the resources of the union.
Timeline
In 1555, the Peace of Augsburg was signed by
Charles V Charles V may refer to:
* Charles V, Holy Roman Emperor (1500–1558)
* Charles V of Naples (1661–1700), better known as Charles II of Spain
* Charles V of France (1338–1380), called the Wise
* Charles V, Duke of Lorraine (1643–1690)
* Infant ...
and Lutheran princes. This treaty gave Roman Catholic and Lutheran princes the freedom to decide the religion which their respective state would be under, but gave no such protection to Calvinist princes. In 1608, Protestant princes formed the alliance known as Protestant Union. The next year, the Catholic League was created. In 1610, the Union intervened in the
War of the Jülich Succession
The War of the Jülich Succession was a war of succession in the United Duchies of Jülich-Cleves-Berg. It lasted between 10 June 1609 and 24 October 1610, resumed in May 1614 and finally ended on 13 October 1614. The first round of the conflict ...
. In 1618, 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 battl ...
began with the outbreak of the
Bohemian Revolt
The Bohemian Revolt (german: Böhmischer Aufstand; cs, České stavovské povstání; 1618–1620) was an uprising of the Bohemian estates against the rule of the Habsburg dynasty that began the Thirty Years' War. It was caused by both reli ...
. Frederick V, Elector Palatine, accepted the crown of Bohemia the following year. The Union declared its neutrality in the conflict between Frederick and the Catholic League in the 1620
Treaty of Ulm. The Union dissolved the next year.
See also
*Other Protestant leagues:
**
League of Torgau (1526-1531), the earliest league of Protestant princes against the Catholic
League of Dessau, succeeded by the Schmalkaldic League
**
Schmalkaldic League
The Schmalkaldic League (; ; or ) was a military alliance of Lutheran princes within the Holy Roman Empire during the mid-16th century.
Although created for religious motives soon after the start of the Reformation, its members later came to ...
(1531-1546), a league of Protestant princes against the Holy Roman Emperor
**
Heilbronn League
The Heilbronn League was formed in the Free Imperial City of Heilbronn, on 23 April 1633, during the Thirty Years' War. Led by Sweden, it brought together various Protestant states in western and northern Germany. It was supported by Saxo ...
(1633-1648), a league of western and southern Protestant German states under Swedish and French guidance
Notes
References
*
*
*
*
*
*
Further reading
* Rickard, J. (17 November 2000), Thirty Years' War (1618–48), http://www.historyofwar.org/articles/wars_thirtyyears.html
* Helfferich, Tryntje. The Thirty Years' War: A Documentary History. Indianapolis: Hackett Pub., 2009. Print.
* Bohemian Protestants and the Calvinist Churches.
* Odložilík, Otakar. Church History, Vol. 8, No. 4 (Dec., 1939), pp. 342–355. Published by: Cambridge University Press on behalf of the American Society of Church History. Article Stable URL: https://www.jstor.org/stable/3160169
{{Authority control
Thirty Years' War
1600s in the Holy Roman Empire
Electoral Palatinate
Anti-Catholicism in Germany
1608 establishments in the Holy Roman Empire
1621 disestablishments in the Holy Roman Empire
Early Modern history of Germany