The Imperial Diet (; ) was the deliberative body of the
Holy Roman Empire
The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
. It was not a
legislative body in the contemporary sense; its members envisioned it more like a central forum where it was more important to negotiate than to decide.
Its members were the
Imperial Estate
An Imperial Estate (; , plural: ') was an entity or an individual of the Holy Roman Empire with representation and the right to vote in the Imperial Diet (Holy Roman Empire), Imperial Diet ('). Rulers of these Estates were able to exercise signi ...
s, divided into three colleges. The
diet as a permanent, regularized institution evolved from the ''
Hoftage'' (court assemblies) of the
Middle Ages
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
. From 1663 until the end of the empire in 1806, it was in
permanent session at
Regensburg
Regensburg (historically known in English as Ratisbon) is a city in eastern Bavaria, at the confluence of the rivers Danube, Naab and Regen (river), Regen, Danube's northernmost point. It is the capital of the Upper Palatinate subregion of the ...
.
All Imperial Estates enjoyed
immediacy and, therefore, they had no authority above them besides the
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 ...
himself. While all the estates were entitled to a seat and vote, only the higher temporal and spiritual princes of the College of Princes enjoyed an individual vote (''Virilstimme''), while lesser estates such as imperial counts and imperial abbots, were merely entitled to a collective vote (''Kuriatstimme'') within their particular bench (''Curia''), as did the free imperial cities belonging to the College of Towns.
The right to vote rested essentially on a territorial entitlement, with the result that when a given prince acquired new territories through inheritance or otherwise, he also acquired their voting rights in the diet. In general, members did not attend the permanent diet at Regensburg, but sent representatives instead. The late imperial diet was in effect a permanent meeting of ambassadors between the estates.
History
The role and function of the Imperial Diet evolved over the centuries, like the Empire itself, with the estates and separate territories increasing control of their own affairs at the expense of imperial power. Initially, there was neither a fixed time nor location for the Diet. It began as a convention of the
duke
Duke is a male title either of a monarch ruling over a duchy, or of a member of Royal family, royalty, or nobility. As rulers, dukes are ranked below emperors, kings, grand princes, grand dukes, and above sovereign princes. As royalty or nobi ...
s of the old
Germanic tribes that formed the
Frankish kingdom when important decisions had to be made, probably based on the old Germanic law whereby each leader relied on the support of his leading men. In the early and high Middle Ages these assemblies were not yet institutionalized, but were held as needed at the decision of the king or emperor. They weren't called Diet yet, but ''
Hoftag'' (''court day''). They were usually held in the imperial palaces ''(
Kaiserpfalz
The term ''Kaiserpfalz'' (, "imperial palace") or ''Königspfalz'' (, "royal palace", from Middle High German ''phal ne'' to Old High German ''phalanza'' from Middle Latin ''palatia'' luralto Latin ''palatium'' "palace") refers to a number o ...
)''.
For example, already under
Charlemagne
Charlemagne ( ; 2 April 748 – 28 January 814) was List of Frankish kings, King of the Franks from 768, List of kings of the Lombards, King of the Lombards from 774, and Holy Roman Emperor, Emperor of what is now known as the Carolingian ...
during the
Saxon Wars
The Saxon Wars were the campaigns and insurrections of the thirty-three years from 772, when Charlemagne first entered Saxony with the intent to conquer, to 804, when the last rebellion of tribesmen was defeated. In all, 18 campaigns were fou ...
, a Hoftag, according to the
Royal Frankish Annals, met at
Paderborn in 777 and determined laws over the subdued
Saxons
The Saxons, sometimes called the Old Saxons or Continental Saxons, were a Germanic people of early medieval "Old" Saxony () which became a Carolingian " stem duchy" in 804, in what is now northern Germany. Many of their neighbours were, like th ...
and other tribes. In 803 Charlemagne, by then crowned as emperor of the Franks, issued the final version of the
Lex Saxonum.
At the Diet of 919 in
Fritzlar
Fritzlar () is a small town (pop. 15,000) in the Schwalm-Eder-Kreis, Schwalm-Eder district in northern Hesse, Germany, north of Frankfurt, with a storied history.
The town has a medieval center ringed by a wall with numerous watch towers. high ...
the dukes elected the first
King of the Germans
This is a list of monarchs who ruled over East Francia, and the Kingdom of Germany (), from Treaty of Verdun, the division of the Francia, Frankish Empire in 843 and Dissolution of the Holy Roman Empire, the collapse of the Holy Roman Empire in ...
, who was a Saxon,
Henry the Fowler, thus overcoming the longstanding rivalry between Franks and Saxons and laying the foundation for the German realm. After the conquest of
Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
, the 1158
Diet of Roncaglia finalized four laws that would significantly alter the (never formally written)
constitution
A constitution is the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organization or other type of entity, and commonly determines how that entity is to be governed.
When these pri ...
of the Empire, marking the beginning of the steady decline of the central power in favour of the local dukes. The
Golden Bull of 1356 cemented the concept of "territorial rule" (''Landesherrschaft''), the largely independent rule of the dukes over their respective territories, and also limited the number of electors to seven. The Pope, contrary to modern myth, was never involved in the electoral process but only in the process of ratification and coronation of whomever the Prince-Electors chose.

Until the late 15th century the Diet was not formalized as an institution. Instead, the dukes and other princes would irregularly convene at the court of the Emperor. These assemblies were usually referred to as ''
Hoftage'' (from German ''Hof'' "court"). Only beginning in 1489 was the Diet called the ''Reichstag'', and it was formally divided into ''collegia'' ("colleges").
Initially, the two colleges were of the
prince-electors and of the remaining dukes and princes. Later, the
imperial cities with
Imperial immediacy
In the Holy Roman Empire, imperial immediacy ( or ) was the status of an individual or a territory which was defined as 'immediate' () to Emperor and Empire () and not to any other intermediate authorities, while one that did not possess that stat ...
became oligarchic republics independent of a local ruler, subject only to the Emperor himself, and managed to be accepted as third parties. Motions passed if two of the colleges approved. Generally, the princely and electoral colleges would agree with each other, rather than rely on the cities to make a decision, but the cities still had influence.
Several attempts to reform the Empire and end its slow disintegration, starting with the
Diet of 1495, did not have much effect. In contrast, this process was hastened with the
Peace of Westphalia
The Peace of Westphalia (, ) is the collective name for two peace treaties signed in October 1648 in the Westphalian cities of Osnabrück and Münster. They ended the Thirty Years' War (1618–1648) and brought peace to the Holy Roman Empire ...
of 1648, which formally bound the Emperor to accept all decisions made by the Diet, in effect depriving him of his few remaining powers. Nonetheless, the Emperor still had substantial influence in the Diet. The
Habsburg Emperors possessed a large number of votes, and even held command over the
Reichsarmee (Imperial Army) if the Diet decided to raise it.

Probably the most famous Diets were those held in
Worms in 1495, where the
Imperial Reform was enacted, and
1521, where
Martin Luther
Martin Luther ( ; ; 10 November 1483 – 18 February 1546) was a German priest, Theology, theologian, author, hymnwriter, professor, and former Order of Saint Augustine, Augustinian friar. Luther was the seminal figure of the Reformation, Pr ...
was banned (see
Edict of Worms), the Diets of
Speyer
Speyer (, older spelling ; ; ), historically known in English as Spires, is a city in Rhineland-Palatinate in the western part of the Germany, Federal Republic of Germany with approximately 50,000 inhabitants. Located on the left bank of the r ...
1526
Year 1526 (Roman numerals, MDXXVI) was a common year starting on Monday of the Julian calendar.
Events
January–March
* January 14 – Treaty of Madrid (1526), Treaty of Madrid: Peace is declared between Francis I of France and ...
and
1529 (see
Protestation at Speyer), and several in
Nuremberg
Nuremberg (, ; ; in the local East Franconian dialect: ''Nämberch'' ) is the Franconia#Towns and cities, largest city in Franconia, the List of cities in Bavaria by population, second-largest city in the States of Germany, German state of Bav ...
(
Diet of Nuremberg). Only with the introduction of the
Perpetual Diet of Regensburg in 1663 did the Diet permanently convene at a fixed location.
The Imperial Diet of Constance opened on 27 April 1507; it recognized the unity of the Holy Roman Empire and founded the
Imperial Chamber, the empire's supreme court.
Participants
From 1489, the Diet comprised three colleges:
Electors
The
Electoral College (''Kurfürstenrat'') was led by the
Prince-Archbishop of Mainz in his capacity as
Archchancellor of
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
. The seven Prince-electors were designated by the Golden Bull of 1356:
* three ecclesiastical
Prince-Bishop
A prince-bishop is a bishop who is also the civil ruler of some secular principality and sovereignty, as opposed to '' Prince of the Church'' itself, a title associated with cardinals. Since 1951, the sole extant prince-bishop has been the ...
s,
** the
Prince-Archbishop of Mainz as Archchancellor of Germany
** the
Prince-Archbishop of Cologne as Archchancellor of
Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
** the
Prince-Archbishop of Trier as Archchancellor of
Burgundy
*four secular Princes,
** the
King of Bohemia as
Archcupbearer
** the
Elector of the Palatinate as
Archsteward (''Erztruchsess'')
** the
Elector of Saxony as
Archmarshal
** the
Margrave of Brandenburg as
Archchamberlain
The number increased to eight, when in 1623 the
Duke of Bavaria
The following is a list of monarchs during the history of Bavaria. Bavaria was ruled by several dukes and kings, partitioned and reunited, under several dynasties. Since 1918, Bavaria has been under a republican form of government, and from 19 ...
took over the electoral dignity of the Count Palatine, who himself received a separate vote in the electoral college according to the 1648
Peace of Westphalia
The Peace of Westphalia (, ) is the collective name for two peace treaties signed in October 1648 in the Westphalian cities of Osnabrück and Münster. They ended the Thirty Years' War (1618–1648) and brought peace to the Holy Roman Empire ...
(''Causa Palatina''), including the high office of an
Archtreasurer. In 1692 the
Elector of Hanover (formally Brunswick-Lüneburg) became the ninth Prince-elector as Archbannerbearer during the
Nine Years' War
The Nine Years' War was a European great power conflict from 1688 to 1697 between Kingdom of France, France and the Grand Alliance (League of Augsburg), Grand Alliance. Although largely concentrated in Europe, fighting spread to colonial poss ...
.
In the
War of the Bavarian Succession, the electoral dignities of the Palatinate and
Bavaria
Bavaria, officially the Free State of Bavaria, is a States of Germany, state in the southeast of Germany. With an area of , it is the list of German states by area, largest German state by land area, comprising approximately 1/5 of the total l ...
were merged, approved by the 1779
Treaty of Teschen. The
German Mediatisation
German mediatisation (; ) was the major redistribution and reshaping of territorial holdings that took place between 1802 and 1814 in Germany by means of the subsumption and Secularization (church property), secularisation of a large number of ...
of 1803 entailed the dissolution of the Cologne and Trier Prince-archbishoprics. At the same time, the Prince-Archbishop of Mainz and German Archchancellor received—as compensation for his lost territory occupied by
Revolutionary France—the newly established
Principality of Regensburg. In turn, four secular princes were elevated to prince-electors:
* the
Duke of Salzburg
* the
Duke of Württemberg
* the
Margrave of Baden
* the
Landgrave of Hesse-Kassel
These changes however had little effect, as with the abdication of
Francis II as Holy Roman Emperor the Empire was dissolved only three years later.
Princes
The college of
Imperial Princes (''Reichsfürstenrat'' or ''Fürstenbank'') incorporated the
Imperial Counts as well as
immediate lords,
Prince-Bishop
A prince-bishop is a bishop who is also the civil ruler of some secular principality and sovereignty, as opposed to '' Prince of the Church'' itself, a title associated with cardinals. Since 1951, the sole extant prince-bishop has been the ...
s and
Imperial abbots. Strong in members, though often discordant, the second college tried to preserve its interests against the dominance of the Prince-electors.
The House of Princes was again subdivided into an ecclesiastical and a secular bench. Remarkably, the ecclesiastical bench was headed by the—secular—
Archduke of Austria and the
Burgundian duke of the
Habsburg Netherlands
Habsburg Netherlands were the parts of the Low Countries that were ruled by sovereigns of the Holy Roman Empire's House of Habsburg. This rule began in 1482 and ended for the Northern Netherlands in 1581 and for the Southern Netherlands in 1797. ...
(held by
Habsburg Spain from 1556). As the Austrian
House of Habsburg
The House of Habsburg (; ), also known as the House of Austria, was one of the most powerful Dynasty, dynasties in the history of Europe and Western civilization. They were best known for their inbreeding and for ruling vast realms throughout ...
had failed to assume the leadership of the secular bench, they received the guidance over the ecclesiastical princes. The first ecclesiastical prince was the
Archbishop of Salzburg as ''
Primas Germaniae''; the
Prince-Archbishop of Besançon, though officially a member until the 1678
Treaty of Nijmegen, did not attend the Diet's meetings.
The ecclesiastical bench also comprised the
Grand Master and ''Deutschmeister'' of the
Teutonic Knights
The Teutonic Order is a Catholic religious institution founded as a military society in Acre, Kingdom of Jerusalem. The Order of Brothers of the German House of Saint Mary in Jerusalem was formed to aid Christians on their pilgrimages to t ...
, as well as the
Grand Prior of the Monastic State of the
Knights Hospitaller
The Order of Knights of the Hospital of Saint John of Jerusalem, commonly known as the Knights Hospitaller (), is a Catholic military order. It was founded in the crusader Kingdom of Jerusalem in the 12th century and had headquarters there ...
at
Heitersheim. The
Prince-Bishopric of Lübeck remained an ecclesiastical member even after it had turned
Protestant
Protestantism is a branch of Christianity that emphasizes Justification (theology), justification of sinners Sola fide, through faith alone, the teaching that Salvation in Christianity, salvation comes by unmerited Grace in Christianity, divin ...
, ruled by
diocesan administrator
A diocesan administrator (also known as archdiocesan administrator, archiepiscopal administrator and eparchial administrator for the case, respectively, of an archdiocese, archeparchy, and eparchy) is a provisional ordinary of a Catholic partic ...
s from the
House of Holstein-Gottorp from 1586. The
Prince-Bishopric of Osnabrück, according to the 1648 Peace of Westphalia was under alternating rule of a
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 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
bishop and a Lutheran bishop from the
House of Hanover
The House of Hanover ( ) is a European royal house with roots tracing back to the 17th century. Its members, known as Hanoverians, ruled Hanover, Great Britain, Ireland, and the British Empire at various times during the 17th to 20th centurie ...
.
Each member of the Princes' College held either a single vote (''Virilstimme'') or a collective vote (''Kuriatstimme''). Due to the Princes, their single vote from 1582 strictly depended on their immediate fiefs; this principle led to an accumulation of votes, when one ruler held several territories in
personal union
A personal union is a combination of two or more monarchical states that have the same monarch while their boundaries, laws, and interests remain distinct. A real union, by contrast, involves the constituent states being to some extent in ...
. Counts and Lords only were entitled to collective votes, they therefore formed separate colleges like the
Wetterau Association of Imperial Counts and mergers within the
Swabian, the
Franconian and the
Lower Rhenish–Westphalian Circles. Likewise, on the ecclesiastical bench, the Imperial abbots joined a Swabian or
Rhenish college.
In the
German Mediatisation
German mediatisation (; ) was the major redistribution and reshaping of territorial holdings that took place between 1802 and 1814 in Germany by means of the subsumption and Secularization (church property), secularisation of a large number of ...
of 1803, numerous ecclesiastical territories were annexed by secular estates. However, a reform of the Princes' college was not carried out until the Empire's dissolution in 1806.
Cities

The college of
Imperial Cities (''Reichsstädtekollegium'') evolved from 1489 onwards. It contributed greatly to the development of the Imperial Diets as a political institution. Nevertheless, the collective vote of the cities was of inferior importance until a 1582
Recess of the
Augsburg Diet. The college was led by the city council of the actual venue until the Perpetual Diet in 1663, when the chair passed to
Regensburg
Regensburg (historically known in English as Ratisbon) is a city in eastern Bavaria, at the confluence of the rivers Danube, Naab and Regen (river), Regen, Danube's northernmost point. It is the capital of the Upper Palatinate subregion of the ...
.
The Imperial cities also divided into a Swabian and Rhenish bench. The Swabian cities were led by
Nuremberg
Nuremberg (, ; ; in the local East Franconian dialect: ''Nämberch'' ) is the Franconia#Towns and cities, largest city in Franconia, the List of cities in Bavaria by population, second-largest city in the States of Germany, German state of Bav ...
,
Augsburg
Augsburg ( , ; ; ) is a city in the Bavaria, Bavarian part of Swabia, Germany, around west of the Bavarian capital Munich. It is a College town, university town and the regional seat of the Swabia (administrative region), Swabia with a well ...
and Regensburg, the Rhenish cities by
Cologne
Cologne ( ; ; ) is the largest city of the States of Germany, German state of North Rhine-Westphalia and the List of cities in Germany by population, fourth-most populous city of Germany with nearly 1.1 million inhabitants in the city pr ...
,
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 ...
and
Frankfurt
Frankfurt am Main () is the most populous city in the States of Germany, German state of Hesse. Its 773,068 inhabitants as of 2022 make it the List of cities in Germany by population, fifth-most populous city in Germany. Located in the forela ...
.
For a complete list of members of the Imperial Diet from 1792, near the end of the Empire, see
List of Reichstag participants (1792).
Religious bodies
After the
Peace of Westphalia
The Peace of Westphalia (, ) is the collective name for two peace treaties signed in October 1648 in the Westphalian cities of Osnabrück and Münster. They ended the Thirty Years' War (1618–1648) and brought peace to the Holy Roman Empire ...
, religious matters could no longer be decided by a majority vote of the colleges. Instead, the Reichstag would separate into Catholic and Protestant bodies, which would discuss the matter separately and then negotiate an agreement with each other, a procedure called the ''
itio in partes''.
The Catholic body, or ''
corpus catholicorum'', was headed by the Archbishop-Elector of
Mainz
Mainz (; #Names and etymology, see below) is the capital and largest city of the German state of Rhineland-Palatinate, and with around 223,000 inhabitants, it is List of cities in Germany by population, Germany's 35th-largest city. It lies in ...
.
The Protestant body, or ''
corpus evangelicorum'', was headed by the Elector of
Saxony
Saxony, officially the Free State of Saxony, is a landlocked state of Germany, bordering the states of Brandenburg, Saxony-Anhalt, Thuringia, and Bavaria, as well as the countries of Poland and the Czech Republic. Its capital is Dresden, and ...
. At meetings of the Protestant body, Saxony would introduce each topic of discussion, after which
Brandenburg-Prussia and
Hanover
Hanover ( ; ; ) is the capital and largest city of the States of Germany, German state of Lower Saxony. Its population of 535,932 (2021) makes it the List of cities in Germany by population, 13th-largest city in Germany as well as the fourth-l ...
would speak, followed by the remaining states in order of size. When all the states had spoken, Saxony would weigh the votes and announce a consensus.
Frederick Augustus I, Elector of Saxony converted to Catholicism in 1697 in order to become King of Poland, but the Electorate itself remained officially Protestant and retained the directorship of the Protestant body. When
the Elector's son also converted to Catholicism, Prussia and Hanover attempted to take over the directorship in 1717–1720, but without success. The Electors of Saxony would head the Protestant body until the end of the Holy Roman Empire.
Collection of records
After the formation of the new
German Empire
The German Empire (),; ; World Book, Inc. ''The World Book dictionary, Volume 1''. World Book, Inc., 2003. p. 572. States that Deutsches Reich translates as "German Realm" and was a former official name of Germany. also referred to as Imperia ...
in 1871, the Historical Commission of the
Bavarian Academy of Sciences started to collect imperial records (''Reichsakten'') and imperial diet records (''Reichstagsakten''). In 1893 the commission published the first volume. At present the years 1524–1527 and years up to 1544 are being collected and researched. A volume dealing with the 1532 Diet of Regensburg, including the peace negotiations with the
Protestants
Protestantism is a branch of Christianity that emphasizes Justification (theology), justification of sinners Sola fide, through faith alone, the teaching that Salvation in Christianity, salvation comes by unmerited Grace in Christianity, divin ...
in
Schweinfurt
Schweinfurt ( , ; ) is a town#Germany, city in the district of Lower Franconia in Bavaria, Germany. It is the administrative centre of the surrounding Schweinfurt (district), district (''Landkreis'') of Schweinfurt and a major industrial, cultur ...
and
Nuremberg
Nuremberg (, ; ; in the local East Franconian dialect: ''Nämberch'' ) is the Franconia#Towns and cities, largest city in Franconia, the List of cities in Bavaria by population, second-largest city in the States of Germany, German state of Bav ...
, by
Rosemarie Aulinger of
Vienna
Vienna ( ; ; ) is the capital city, capital, List of largest cities in Austria, most populous city, and one of Federal states of Austria, nine federal states of Austria. It is Austria's primate city, with just over two million inhabitants. ...
was published in 1992.
Locations
See also
*
Imperial Diet (disambiguation)
References
Bibliography
* Peter Claus Hartmann: ''Das Heilige Römische Reich deutscher Nation in der Neuzeit 1486–1806''. Stuttgart 2005, .
* Axel Gotthard: ''Das Alte Reich 1495–1806''. Darmstadt 2003,
* Edgar Liebmann: ''Reichstag''. In: Friedrich Jaeger (Hrsg.): ''Enzyklopädie der Neuzeit, Bd. 10: Physiologie-Religiöses Epos''. Stuttgart 2009, str. 948–953,
* Barbara Stollberg-Rilinger: ''Des Kaisers alte Kleider. Verfassungsgeschichte und Symbolsprache des Alten Reiches.'' München 2008,
* Helmut Neuhaus: ''Das Reich in der frühen Neuzeit'' (Enzyklopädie Deutscher Geschichte, Band 42). München 2003, .
* Heinz Angermeier: ''Das alte Reich in der deutschen Geschichte. Studien über Kontinuitäten und Zäsuren''. München 1998,
External links
*
{{Authority control
Historical legislatures