Question: Who was was a burgraviate of a multi-ethnic complex of territories in central Europe that developed during the Early Middle Ages and continued until its dissolution in 1806?

full_context: Document 1: Moravia: Moravia ( ; Czech: "Morava" ; German:    ; Polish: "Morawy" ; Latin: "Moravia" ) is a historical country in the Czech Republic (forming its eastern part) and one of the historical Czech lands, together with Bohemia and Czech Silesia. The medieval and early modern Margraviate of Moravia was a crown land of the Lands of the Bohemian Crown (from 1348 to 1918), an imperial state of the Holy Roman Empire (1004 to 1806), later a crown land of the Austrian Empire (1804 to 1867) and briefly also one of 17 former crown lands of the Cisleithanian part of the Austro-Hungarian Empire from 1867 to 1918. During the early 20th century, Moravia was one of the five lands of Czechoslovakia from 1918 to 1928; it was then merged with Czech Silesia, and eventually dissolved by abolition of the land system in 1949.
Document 2: Schönborn family: Schönborn is a noble and mediatised former sovereign princely family from the former Holy Roman Empire. Several members of the family have held high offices of the Roman Catholic Church and the Holy Roman Empire over the course of centuries, including as Bishops, Prince-Bishops, Cardinals and Prince-Electors. In addition to several family members having been elected monarchs of ecclesiastical principalities—the Electorate of Mainz, the Prince-Bishopric of Würzburg, the Prince-Bishopric of Worms, the Prince-Bishopric of Speyer, the Electorate of Trier, and the Prince-Bishopric of Bamberg—the family possessed a fiefdom in Franconia that held imperial immediacy, and was thus a principality of the Holy Roman Empire, the state of Schönborn.
Document 3: Becherbach bei Kirn: Becherbach bei Kirn is an "Ortsgemeinde" – a municipality belonging to a "Verbandsgemeinde", a kind of collective municipality – in the Bad Kreuznach district in Rhineland-Palatinate, Germany. It belongs to the "Verbandsgemeinde" of Kirn-Land, whose seat is in the town of Kirn, although this lies outside the "Verbandsgemeinde". Becherbach bei Kirn should not be confused with Becherbach. Becherbach bei Kirn has borne the tag “bei Kirn” since 1 July 1969, at which time both municipalities found themselves in the same district as a result of administrative reform.
Document 4: Duchy of Württemberg: The Duchy of Württemberg (German: "Herzogtum Württemberg" ) was a duchy located in the south-western part of the Holy Roman Empire. It was a member of the Holy Roman Empire from 1495 to 1806. The dukedom's long survival for nearly four centuries was mainly due to its size, being larger than its immediate neighbors. During the Protestant Reformation, Württemberg faced great pressure from the Holy Roman Empire to remain a member. Württemberg resisted repeated French invasions in the 17th and 18th centuries. Württemberg was directly in the path of French and Austrian armies who were engaged in the long rivalry between the House of Bourbon and the House of Habsburg. In 1803, Napoleon raised the duchy to be the Electorate of Württemberg of the Holy Roman Empire, and when he abolished the Empire in 1806, the Electorate was elevated as the Kingdom of Württemberg.
Document 5: Austrian Empire: The Austrian Empire (Austrian German: "Kaiserthum Oesterreich" , modern spelling "Kaisertum Österreich ") was a Central European multinational great power from 1804 to 1867 created by proclamation out of the realms of the Habsburgs. It was the third most populous empire after Russia and France, as well as the largest and strongest country in the German Confederation. Geographically, it was the second largest empire in Europe after the Russian Empire (621,538 square kilometres [239,977 sq mi]). Proclaimed in response to the First French Empire, it overlapped with the Holy Roman Empire until the latter's dissolution in 1806. The "Ausgleich" of 1867 elevated Hungary's status. It became a separate entity from the Empire entirely, joining with it in the dual monarchy of Austria-Hungary.
Document 6: Rheingau (wine region): Rheingau is one of 13 designated German wine regions ("Weinbaugebiete") producing quality wines ("QbA" and "Prädikatswein"). It was named after the traditional region of Rheingau (meaning "Rhine district"), the wine region is situated in the state of Hesse, where it constitutes part of the Rheingau-Taunus-Kreis administrative district. Although, making up only 3 percent of the total German vineyard area, Rheingau has been the source of many historically important innovations in German wine making, and contains many wine producers of international reputation, such as Schloss Johannisberg. Rheingau, with 3125 ha of vineyards in 2008, also boasts a higher proportion of Riesling (78.8%) than any other German wine-growing region, with Spätburgunder (Pinot noir) making up most of the rest (12.2%), followed by Müller-Thurgau (1.6%).
Document 7: Habsburg Monarchy: The Habsburg Monarchy (German: "Habsburgermonarchie" ) or Empire, is an unofficial appellation among historians for the countries and provinces that were ruled by the between 1521 and 1780 and then by the successor branch of Habsburg-Lorraine until 1918. The Monarchy was a composite state composed of territories within and outside the Holy Roman Empire, united only in the person of the monarch. The dynastic capital was Vienna, except from 1583 to 1611, when it was moved to Prague. From 1804 to 1867 the Habsburg Monarchy was formally unified as the Austrian Empire, and from 1867 to 1918 as the Austro-Hungarian Empire.
Document 8: Holy Roman Empire: The Holy Roman Empire (Latin: "Sacrum Imperium Romanum" ; German: "Heiliges Römisches Reich" ) was a multi-ethnic complex of territories in central Europe that developed during the Early Middle Ages and continued until its dissolution in 1806. The largest territory of the empire after 962 was the Kingdom of Germany, though it also came to include the Kingdom of Bohemia, the Kingdom of Burgundy, the Kingdom of Italy, and numerous other territories.
Document 9: Burgraviate of Rheineck: The Burgraviate of Rheineck was a burgraviate of the Holy Roman Empire. It was a member of the Upper Rhenish Circle.
Document 10: Grand duchy: A grand duchy is a country or territory whose official head of state or ruler is a monarch bearing the title of grand duke or grand duchess. Relatively rare until the abolition of the Holy Roman Empire in 1806, the term was often used in the official name of countries smaller than most continental kingdoms of modern Europe (e.g., Denmark, Spain, United Kingdom) yet larger than most of the sovereign duchies in the Holy Roman Empire, Italy or Scandinavia (e.g. Anhalt, Lorraine, Modena, Schleswig-Holstein). During the 19th century there were as many as 14 grand duchies in Europe at once (a few of which were first created as exclaves of the Napoleonic empire but later re-created, usually with different borders, under another dynasty). Some of these were sovereign and nominally independent (Baden, Hesse and by Rhine, Mecklenburg-Schwerin, Mecklenburg-Strelitz, Oldenburg, Saxe-Weimar and Tuscany), some sovereign but held in personal union with larger realms by a monarch whose grand-dukedom was borne as a subsidiary title (Finland, Luxembourg, Transylvania), some of which were client states of a more powerful realm (Cleves and Berg), and some whose territorial boundaries were nominal and the position purely titular (Frankfurt).
Document 11: Rätia (train): Rätia is a EuroCity train service that linked Hamburg in Germany with Chur in Switzerland via Dortmund, Cologne, Mannheim, Basel and Zurich, following the river Rhine for a significant part of its journey. The service is named after Rhaetia, the Roman province that the city of Chur was in. Over the years, the name "Rätia" has been given to a number EC services between Chur and various parts in Germany, although the current services - EC 6/7 - lost their name in 2004. Since 2015 the service's southern terminus was cut bach to Zurich.
Document 12: House of Habsburg: The House of Habsburg ( ; ] ), also called House of Austria, was one of the most influential and outstanding royal houses of Europe. The throne of the Holy Roman Empire was continuously occupied by the Habsburgs between 1438 and 1740. The house also produced emperors and kings of the Kingdom of Bohemia, Kingdom of England ("Jure uxoris" King), Kingdom of Germany, Kingdom of Hungary, Kingdom of Croatia, Second Mexican Empire, Kingdom of Ireland ("Jure uxoris" King), Kingdom of Portugal, and Spain, as well as rulers of several Dutch and Italian principalities. From the 16th century, following the reign of Charles V, the dynasty was split between its Austrian and Spanish branches. Although they ruled distinct territories, they nevertheless maintained close relations and frequently intermarried.
Document 13: Bacharach: Bacharach ( , also known as "Bacharach am Rhein") is a town in the Mainz-Bingen district in Rhineland-Palatinate, Germany. It belongs to the "Verbandsgemeinde" of Rhein-Nahe, whose seat is in Bingen am Rhein, although that town is not within its bounds.
Document 14: Altes Schloss (Bad Berneck): The Altes Schloss ("Old Castle") near Bad Berneck in south Germany is a ruined castle built in the Gothic style as an "Amtsburg" towards the end of the High Middle Ages. The castle lies on the "Schlossberg" ("castle hill") of Bad Berneck in the Upper Franconian district of Bayreuth in Bavaria. Today the lofty keep is the emblem of this small spa town.
Document 15: List of German monarchs: This is a list of monarchs who ruled over the German territories of central Europe from the division of the Frankish Empire in 843 (by which a separate Eastern Frankish Kingdom was created), until the collapse of the German Empire in 1918. It also includes heads of the various German confederations after the collapse of the Holy Roman Empire of the German Nation in 1806, and head of the first federation state, the North German Confederation, from 1867 to 1871.
ground_truth: Burgraviate of Rheineck