List of states in the Holy Roman Empire (M)

This is a list of states in the Holy Roman Empire beginning with the letter M:

Name	Type	Circle	Bench	Formed	Notes
Magdeburg	967: Archbishopric 1180: HRE Prince-Archbishopric	Low Sax	EC	968: diocese est. 1180: Partitioned from the older Duchy of Saxony	805: 1st mention of Magdeburg Before 1180: Part of older Duchy of Saxony, till emperor deposed Henry the Lion 1180: Gained Imperial immediacy at the carve-up of the older Duchy of Saxony 1648:Secularized as a duchy to Brandenburg
Magdeburg	Burgraviate
20px Mahlberg	Lordship
Maienfeld	Lordship
Mainz	Archbishopric 1356: HRE Prince-Elector	El Rhin	EL	962	1512: Electoral Rhenish Circle 1803: Merged with Bp. of Regensburg
Mainz	Free City			1244	1462: Annexed by Abp. of Mainz
Manderscheid Count of Manderscheid, Blankenheim & Gerolstein	Lordship 1453: County 1460: HRE County			c934	1270: To Lords of Manderscheid 1488: Partitioned into Manderscheid-Blankenheim-Gerolstein, Manderscheid-Kail (extinct 1762) and Manderscheid-Schleiden 1760: Passed by marriage to Counts of Sternberg 1802: Acquired Abbeys of Schussenried and Weissenau for loss to France of Blankenheim, Junkerath, Gerolstein and Dollendorf.1806: Mediatised to Wurttemberg
20px Manderscheid-Schleiden	County			1488: Partitioned from Manderscheid	1647: Annexed to Kall
Mansfeld HRE Prince and Prince of Fondi, Count and Lord of Mansfeld, Noble Lord of Heldrungen, Seeburg and Schraplau, Lord of the Lordship of Dobrzisch, Neuhaus and Arnstein	County	Upp Sax		1051	973: 1st mention of Mansfeld 1079: Mansfeld appointed count in northern Hattgau 1229: Mansfeld male line died out; inherited by Counts of Querfurt by female inheritance Acquired Lordship of Bornstedt 1501: Division into Mansfeld-Vorderort, Mansfeld-Mittelort, and Mansfeld-Hinterort Partitions annexed by Mansfeld-Bornstedt 1563: Mansfeld-Vorderort division into Arnstein (extinct 1615), Artern (extinct 1631), Bornstedt (extinct 1780), Eisleben (extinct 1710), Friedeburg (extinct 1626) and Heldrungen (extinct 1572) lines 1580: Lost imperial immediacy 1602: Mansfeld-Mittelort line died out 1666: Mansfeld-Hinterort line died out 1771: Marriage of heiress of Mansfeld-Vordeort-Bornstedt with the Prince of Colloredo; founding of Colloredo-Mansfeld line 1780: Mansfeld-Vorderort line died out; territory annexed to Saxony
Marchtal	Abbacy	Swab			1793: Council of Princes
20px Mark	1198: County	Low Rhen	PR	1160: Split off from Berg	1368: United with Cleves 1521: United with Berg and Cleves 1609: War of Succession 1614: Annexed to Brandenburg 1666: Annexation by Brandenburg generally recognized
20px Martinstein	Lordship
Massa (Malaspina)	Lordship 1662: Duchy of Massa and Principality of Carrara				1797-1814: French occupation
20px Matsch	HRE County				1505: Line died out
20px Maulbronn	RA
Maursmunster	Imperial Abbey
Mechelen (Malines)	Lordship	Burg		c950: Fief of Bishop of Liège	1356: To Count of Flanders Passed to Habsburg 1512: Burgundian Circle
20px Mecklenburg Grand Duke of Mecklenburg, Prince of the Wends, Schwerin & Ratzeburg, Count of Schwerin, Lord of the Lands of Rostock & Stargard	1170: Principality 1348: Duchy 1815: Grand Duchy	Low Sax	PR	1139	1229: Partitioned into Mecklenburg, Werle, Rostock and Parchim 1304: Princes of Mecklenburg acquired Stargard as marriage dowry 1314: Prince of Rostock line died out 1416: Prince of Parchim line died out 1323: Acquired Rostock 1353: Partitioned 1358: Purchase of Schwerin from the Counts of Tecklenburg and Schwerin 1436: Acquisition of the lands of the extinct branch of Werle 1471: Mecklenburg-Stargard line died out; Mecklenburg reunited 1536: Division into Mecklenburg-Schwerin and Mecklenburg-Gustrow 1582: HRE Council of Princes 1610: Mecklenburg principalities reunited 1621: Partitioned into Mecklenburg-Schwerin and Mecklenburg-Güstrow 1628: Dukes of Mecklenburg placed under an imperial ban 1629: To Albert of Wallenstein 1631: Dukes of Mecklenburg restored to their lands by Gustavus Adolphus of Sweden 1648: Acquired secularized Bishoprics of Schwerin and Ratzeburg 1808: Confederation of the Rhine 1815: German Confederation
20px Mecklenburg-Güstrow	Duchy	Low Sax	PR	1621: Created on partition of D. of Mecklenburg	1582: HRE Council of Princes 1695: Mecklenburg-Gustrow line became extinct 1701: Partitioned between Mecklenburg-Schwerin and Mecklenburg-Strelitz
Mecklenburg-Schwerin Grand Duke of Mecklenburg, Prince of the Wendes, Schwerin & Ratzeburg, Count of Schwerin, Lord of the Lands of Rostock and Stargard	1621: Duchy 1815: Grand Duchy	Low Sax	PR	1621: Created on partition of D. of Mecklenburg	1582: HRE Council of Princes 1808: Joined Confederation of the Rhine 1815: Joined German Confederation 1867: Joined North German Confederation 1871: Joined the German Empire
Mecklenburg-Strelitz Grand Duke of Mecklenburg, Prince of the Wendes, Schwerin and Ratzeburg, Count of Schwerin, Lord of the Lands of Rostock and Stargard	1701: Duchy 1815: Grand Duchy	Low Sax	PR	1701: Created on partition of D. of Mecklenburg-Güstrow	1808: Joined Confederation of the Rhine 1815: Joined German Confederation 1867: Joined North German Confederation 1871: Joined the German Empire
Megen	HRE County				1145: 1st mention of Free Imperial County of Megen 1795: French occupation 1801: To Batavian Republic Includes city of Megen and villages of Haren and Macharen
Meissen	Bishopric			948	1559: Secularized to Saxe-Meissen
Meissen	1088: Margraviate			928	1440: Partitioned between Bp. of Meissen, D. of Saxe-Wittenberg and Lgv. of Thuringia
Memmingen	Imperial City	Swab	SW	1286	1803: Mediatized to Bavaria
Mergentheim	13th century: Bailiwick (Ballei) of the Teutonic Order 1805: Principality				1058: 1st mention of Mergentheim 13th century: Counts of Hohenlohe assigned Mergentheim estates to Teutonic Order 1500: Franconian Circle 1805: Raised to Principality in Treaty of Pressburg Removed from Teutonic Order, given to Empire of Austria 1809: Promised to and annexed by Kingdom of Württemberg, from Napoleon 1810: Austria dropped all claims
Merseburg	968: Bishopric			968	850: 1st mention of Merseburg 1561: Bishopric suppressed and passed to Saxony<nr>1565: Secularized to Saxony 1656-1738: Seat of Dukes of Saxe-Merseburg 1815: To Prussia
Meßkirch (Messkirch)	Lordship	Swab			1080: 1st mention of Messkirch To Counts of Rohrdorf 1210: Sold to Truchsess of Waldburg To Counts of Zimmern Inherited through marriage by Counts of Helfenstein, Lords of Gundelfingen 1627: To Furstenberg 1806: To Grand Duchy of Baden
Metz	6th century: Bishopric	Upp Rhen		945, 1047, 1152: Annexed the Metzgau piecemeal	1558: Annexed to France 1648: Formally ceded to France
Metz	Imperial City	Upp Rhen		1207	1552: Annexed to France
Millendonk (Myllendonk)	Lordship 1700: HRE Lordship	Low Rhen			1263: Passed to Pesch Millendonk family 1268: Under overlordship of Guelders 1279: Under overlordship of Cologne Passed to Reifferscheid 1350: To Mirlar Inherited by Bronckhorst 1682/1690: To Dukes of Croy 1694: To Countess of Berlepsch 1700: To Counts of Ostein (by female inheritance) 1794: French occupation 1815: To Prussia
Mindelheim	Lordship HRE Principality of Mindelheim and Schwabegg				1704: To Dukes of Marlborough, Lost 1714 to the Elector of Bavaria under Treaty of Utrecht
20px Minden	803: Bishopric 1180: HRE Prince-Bishopric	Low Rhen	EC	977: diocese est. 1180: Partitioned from the older Duchy of Saxony	Before 1180: Part of older Duchy of Saxony, till emperor deposed Henry the Lion 1180: Gained Imperial immediacy at the carve-up of the older Duchy of Saxony 1636: Swedish occupation 1648: By Treaty of Westphalia, secularized as a Principality of Minden
20px Minden	Principality	Low Rhen	PR	1648: Secularized from Bp. of Minden	Held by Brandenburg 1807: To Kingdom of Westphalia 1815: To Prussia
Moers (Mors)	Lordship c. 1240: County 1706: Principality	Low Rhen		c. 1150	1493: Passed to Wied-Runke 1519: Passed to Neuenahr 1601: Inherited by Nassau-Orange 1702: Inherited by Brandenburg-Prussia 1794: French occupation 1815: To Prussia
Mollwitz (Małujowice)	Principality
Mondsee	RA	in Austria
Mons (Bergen)	County			980: Partitioned from counsthip of Hainaut	1071: Merged back into Hainaut
Monschau	Barony			1221	1435: Annexed to Jülich
22px Montbéliard (Mompelgard)	11th century: HRE County Princely County	None			1397-1793: Passed by marriage to Counts of Wurttemberg 1793: Annexed to France
Montechiarugolo	County			1180: Partitioned from Guastalla	1612: Acquired by the Duchy of Parma
Montfort	County			1180: Partitioned from Tübingen	Descended from Counts Palatine of Tübingen 1160: Marriage of Hugo of Tübingen and Elizabeth, heiress of Bregenz Acquired Bludenz Acquired Bregenz (extinct 1523) Acquired Lordship of Feldkirch (line extinct 1390) Acquired Lordship of Heiligenberg Acquired Herrenberg Acquired Langenargen Acquired Pfullendorf Acquired Rheinegg Acquired Rothenfels Acquired Sargans Acquired Lordship of Tettnang (line extinct 1779) Acquired Tosters Acquired Tübingen Acquired Vaduz Acquired Wasserburg Acquired Werdenberg Acquired Zollern 1780: Sold to Austria to pay debts 1787: Montfort dynasty died out
Montfort-Montfort	County			1482: Partitioned from Montfort-Stadeck	1780: Divided between Austria and Württemberg
Mosbach	Imperial Free City
Mötzkirch	Lordship			1495: Partitioned from Zimmern	1594: Annexed to Helffenstein
Mühlhausen	Imperial City	Low Sax	RH	1180	1803: Mediatized to Brandenburg
Mulhouse	Imperial City				1798: To France
Münchenroth	Imperial Abbey	Swab	SP	1126	1497: Imperial immediacy 1803: Secularized
20px Münster (Munster)	791: Bishopric 1134: Prince-Bishopric 1180: HRE Prince-Bishopric	Low Rhen	EC	1180: Partitioned from the older Duchy of Saxony	1122: Acquired County of Kappenberg as fief of the older Duchy of Saxony c. 1170: Acquired Lordship of Stromberg as fief of the older Saxony Before 1180: Part of older Saxony, till emperor deposed Henry the Lion 1180: Gained Imperial immediacy at the carve-up of the older Saxony 1252: Acquired Lordship of Vechta from Ravensberg 1269: Purchased County of Horstmar 1310-1359: Purchased eastern half of Lordship of Lohn 1400: Acquired Ahaus in pledge 1793: Council of Princes 1803: Secularized to Prussia, Arenberg, Looz, Salm and Croy
20px Münster	Imperial Free City	Upp Rhen			1648: Annexed to France
Murbach	Imperial Abbey
Muri	Abbacy