All articles starting with D
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Duchy of Bohemia
The Duchy of Bohemia (České knížectví) was the medieval Czech principality ruled by the Přemyslid dynasty from the late 9th century, centered on Prague, until it became a kingdom in 1212.
Duchy of Brabant
Duchy of Brabant (Hertogdom Brabant), a Holy Roman Empire principality in the southern Low Countries under the Houses of Louvain, Burgundy, and Habsburg; covered today's Flemish and Walloon Brabant, Antwerp, Brussels, and North Brabant, and was partitioned at the Peace of Münster in 1648.
Duchy of Brittany
Duchy of Brittany: northwestern French principality created under the Carolingians, ruled by the Montfort dynasty 1364–1491, united to France by Anne of Brittany's marriages and the 1532 Edict of Union with retained privileges.
Duchy of Brunswick
Duchy of Brunswick (Herzogtum Braunschweig), also Duchy of Brunswick and Lüneburg: northern German Guelph duchy, 1815–1918, a German Empire constituent state; regency 1884–1913; merged into Lower Saxony 1946.
Duchy of Burgundy
Duchy of Burgundy (Duché de Bourgogne): French feudal duchy between Saône and Loire, capital Dijon; Valois apanage 1363–1477, core of the wider Burgundian State; reverted to France after Charles the Bold died at Nancy.
Duchy of Carniola
The Duchy of Carniola (Slovene: Kranjska, German: Krain) was a duchy and crownland of the Holy Roman Empire in present-day central Slovenia, with its capital at Ljubljana.
Duchy of Cornwall
Duchy of Cornwall: private landed estate created by Edward III's 1337 charter to fund the heir to the throne, now Prince William, 25th Duke; £22.9m profit in 2025, Treasury oversight, eldest-son succession rule.
Duchy of Courland and Semigallia
Duchy of Courland and Semigallia (Kurzemes un Zemgales hercogiste, Ducatus Curlandiae et Semigallia): Baltic vassal duchy of Poland-Lithuania, 1561–1795, founded by Gotthard Kettler; briefly colonized Tobago and the Gambia under Duke Jakob; annexed by Russia in 1795.
Duchy of Estonia (1219–1346)
The Duchy of Estonia (Estonian: Eestimaa hertsogkond) was northern Estonia ruled by the king of Denmark from 1219 until its sale to the Teutonic Order in 1346.
Duchy of Friedland
The Duchy of Friedland was a territory in the Kingdom of Bohemia created in the 1620s for Albrecht von Wallenstein and dissolved after his assassination in 1634.
Duchy of Greater Poland
The Duchy of Greater Poland (Księstwo wielkopolskie) was a medieval Polish duchy with its capital at Poznań, created in 1138 and incorporated into Poland in 1320.
Duchy of Kldekari
The Duchy of Kldekari was a duchy in feudal Georgia, centered on Kldekari fortress in Trialeti and ruled by the Baghvashi family until King David IV abolished it in 1103.
Duchy of Krnov
The Duchy of Krnov (Jägerndorf), also called the Principality of Krnov, was a Silesian duchy centered on Krnov and Bruntál, ruled successively by the Přemyslids, Hohenzollerns, and Liechtensteins.
Duchy of Ksani
The Duchy of Ksani, known in Georgian as Ksnis Saeristavo, was a feudal duchy in the Ksani valley of eastern Georgia, ruled by hereditary eristavs of the Kvenipneveli family and a major power in Georgian politics.
Duchy of Lancaster
The Duchy of Lancaster is a private estate of land and property held in trust for the reigning British Sovereign, providing income through the Privy Purse.
Duchy of Livonia
The Duchy of Livonia (Latvian: Pārdaugavas hercogiste) was a vassal territory of the Grand Duchy of Lithuania, formed in 1561 from Livonia north of the Daugava River.
Duchy of Lucca
Duchy of Lucca (Ducato di Lucca), a Bourbon-ruled Italian state 1817–1847, successor to the Republic of Lucca; assigned to Maria Luisa di Borbone by the Congress of Vienna and ceded to Tuscany in 1847.
Duchy of Masovia
The Duchy of Masovia (Księstwo Mazowieckie) was a Piast-ruled duchy in central Poland, independent from 1234 and incorporated into the Kingdom of Poland in 1526.
Duchy of Milan
Duchy of Milan (Ducato di Milano), northern Italian state created by imperial diploma in 1395 for Gian Galeazzo Visconti, ruled by Visconti then Sforza until 1535, when it devolved to Charles V and later passed to Habsburg Spain and Austria.
Duchy of Modena and Reggio
Duchy of Modena and Reggio (Ducato di Modena e Reggio), an Italian state created by imperial investiture of Borso d'Este in 1452, ruled by the Este and Habsburg-Este dynasties, capital moved from Ferrara to Modena in 1598, ended with annexation to Piedmont-Sardinia in 1859.
Duchy of Münsterberg
The Duchy of Münsterberg (Księstwo Ziębickie) was a Silesian duchy in Lower Silesia from 1322 to 1742, ruled successively by the Piasts, the Podiebrads, and the Auerspergs.
Duchy of Nassau
Duchy of Nassau (Herzogtum Nassau), German state 1806-1866 formed by the Walram lines Nassau-Usingen and Nassau-Weilburg, capital Wiesbaden; annexed by Prussia October 3, 1866 after siding with Austria; its dynasty later inherited Luxembourg.
Duchy of Neopatras
The Duchy of Neopatras was a Catalan principality in southern Thessaly and central Greece, created in 1319 and ruled in union with the Duchy of Athens until 1390.
Duchy of Normandy
Duchy of Normandy: northern French principality founded by the 911 Treaty of Saint-Clair-sur-Epte, granted by Charles the Simple to the Viking Rollo. United with England under William the Conqueror from 1066; mainland lost to France in 1204, Channel Islands retained.
Duchy of Parma and Piacenza
Duchy of Parma and Piacenza (Ducato di Parma e Piacenza): northern Italian state created in 1545 by Pope Paul III for his son Pier Luigi Farnese; ruled by the Farnese then Bourbons until annexation to Sardinia after the plebiscite of 11 March 1860.
Duchy of Pomerania
Duchy of Pomerania, a Holy Roman Empire duchy on the Baltic coast ruled by the Griffin dynasty until 1637; partitioned at Westphalia (1648) between Sweden (Vorpommern, Rügen) and Brandenburg (Hinterpommern), later absorbed by Prussia.
Duchy of Prussia
Duchy of Prussia (Herzogtum Preußen, Prusy Książęce), 1525–1701: Protestant secular duchy created by Albrecht von Brandenburg-Ansbach from the Teutonic Order's state as a Polish fief under the Treaty of Cracow; union with Brandenburg 1618, suzerainty ended 1657, kingdom 1701.
Duchy of Racha
The Duchy of Racha (Rachis saeristavo) was a duchy of feudal Georgia in the upper Rioni valley, existing from the late 10th century until 1769.
Duchy of Saint Sava
The Duchy of Saint Sava was a late medieval South Slavic polity in the western Balkans, ruled by Stjepan Vukčić Kosača from 1448 until the Ottoman conquest.
Duchy of Salona
The Duchy of Salona, also called the County of Salona (Catalan comtat de la Sola), was a crusader state in central Greece from 1204 to 1410.