This is a list of states in the Holy Roman Empire beginning with the letter U. Some historians mark the beginning of the Empire as 800, with the coronation of Frankish king Charlemagne ("Charles the Great").
Name Type Imperial circle Imperial diet History Überlingen Imperial City Swab SW 1268: Free Imperial City1803: To Baden Ulm Imperial City Swab SW 1115: Free Imperial City1802: To Bavaria1810: To Württemberg Umpfenbach Territory n/a n/a n/a1773: Purchased by Philipp Freiherr von Gudenus and Valentin Ferdinand Freiherr von Gudenus from Christian Friedrich Carl Graf zu Castell-Remlingen"Gudenus" heirsofeurope Retrieved September 18, 2019June 1, 1805: Purchased by Ferdinand von Trauttmansdorff from Ferdinand Freiherr von Gudenus "Gudenus" heirsofeurope Retrieved September 18, 2019 Unterwalden Imperial Valley n/a n/a Divided into Nidwalden and Obwalden from an early date1173: To Counts of Habsburg1291: Became a founding member of the Swiss League1324: Imperial immediacyBy 1350: Permanent division into Obwalden and Nidwalden1648: Left Empire as member of Swiss Confederation Upper Alsace (Sundgau; Oberelsaß) Landgraviate n/a n/a 1130: To Habsburg1469: Sold to Burgundy1477: To the Burgundian Netherlands1516: To Austria1648: To France Upper Bavaria (Oberbayern) Duchy n/a n/a 1255: Partitioned from Bavaria1314: Partitioned into the Palatinate and itself1340: Renamed to Bavaria1349: Partitioned from Bavaria1363: Extinct; to Bavaria-Landshut Upper SalmSee: Salm in the Vosges County Urach County n/a n/a 1040: First mentioned; brother of Achalm 1080: First use of title Count of Urach1098: Acquired Achalm1218: Acquired Freiburg1250: Partitioned into Freiburg, itself and Fürstenberg1261: Extinct; to Fürstenberg1265: Sold to Württemberg Uri Imperial Valley n/a n/a 853: To Fraumünster Abbey as part of Swabia12th Century: To Zähringen1218: To Habsburg1231: Free Imperial Valley1291: Became a founding member of the Swiss League1648: Left Empire as member of Swiss Confederation Ursberg Abbacy Swab SP 1126-8: Founded1143: Imperial immediacy1803: To Bavaria Ursin von RosenbergSee: Orsini-Rosenberg Principality Utrecht Bishopric Low Rhen n/a 695: Diocese established1024: HRE Prince of the Empire1528: Secularised as the Lordship of Utrecht; to the Spanish Netherlands Utrecht Lordship Burg n/a 1528: Bishopric of Utrecht secularised; to the Spanish Netherlands1548: Transferred to the Burgundian Circle1579: Dutch Revolt against Spain1648: Left the Empire as part of the Netherlands Uznach Lordship1209: County n/a n/a 12th Century: To Rapperswil1195: To Toggenburg1209: HRE Count1436: To Raron; disputed by Zürich1469: Sold to Schwyz and Glarus in condominium1648: Left the Empire as part of Switzerland
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