Rheinfelden may refer to:
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The canton of Aargau is one of the more northerly cantons of Switzerland. It is situated by the lower course of the Aare River, which is why the canton is called Aar-gau. It is one of the most densely populated regions of Switzerland.
The House of Zähringen was a dynasty of Swabian nobility. Their name is derived from Zähringen castle near Freiburg im Breisgau.
Agnes of Poitou, also called Agnes of Aquitaine or Empress Agnes, a member of the House of Poitiers, was German queen from 1043 and Holy Roman Empress from 1046 until 1056. From 1056 to 1061 she acted as Regent of the Holy Roman Empire during the minority of her son Henry IV.
The Dukes of Swabia were the rulers of the Duchy of Swabia during the Middle Ages. Swabia was one of the five stem duchies of the medieval German kingdom, and its dukes were thus among the most powerful magnates of Germany. The most notable family to rule Swabia was the Hohenstaufen family, who held it, with a brief interruption, from 1079 until 1268. For much of this period, the Hohenstaufen were also Holy Roman Emperors. With the death of Conradin, the last Hohenstaufen duke, the duchy itself disintegrated, although King Rudolf I attempted to revive it for his Habsburg family in the late-13th century.
Frederick I was Duke of Swabia from 1079 to his death, the first ruler from the House of Hohenstaufen (Staufer).
Rudolf of Rheinfelden was Duke of Swabia from 1057 to 1079. Initially a follower of his brother-in-law, the Salian emperor Henry IV, his election as German anti-king in 1077 marked the outbreak of the Great Saxon Revolt and the first phase of open conflict in the Investiture Controversy between Emperor and Papacy. After a series of armed conflicts, Rudolf succumbed to his injuries after his forces defeated Henry's in the Battle on the Elster.
Rheinfelden is a municipality in the canton of Aargau in Switzerland, seat of the district of Rheinfelden. It is located 15 kilometres east of Basel. The name means the fields of the Rhine, as the town is located on the High Rhine. It is home to Feldschlösschen, the most popular beer in Switzerland. The city is across the river from Rheinfelden in Baden-Württemberg; the two cities were joined until Napoleon Bonaparte fixed the Germany–Switzerland border on the Rhine in 1802 and are still socially and economically tied.
The Fricktal is a region on Northwestern Switzerland, comprising the Laufenburg and Rheinfelden districts of the Swiss canton of Aargau. The region was known as Frickgau in the medieval period, ultimately from a Late Latin [regio] ferraricia, in reference to the iron mine located here in the Roman era, also transferred to the village of Frick as the main settlement.
Berthold II, Duke of Carinthia, also known as Berthold I of Zähringen, was a progenitor of the Swabian House of Zähringen. From 1061 until 1077, he was the Duke of Carinthia and Margrave of Verona.
Berthold I, better known as Berthold of Rheinfelden, was the Duke of Swabia from 1079 until his death. He was the eldest son of Rudolf of Rheinfelden, duke of Swabia, and German anti-king (r.1077-1079) in opposition to Henry IV of Germany.
Berthold II, also known as Berchtold II, was the Duke of Swabia from 1092 to 1098. After he conceded the Duchy of Swabia to the Staufer in 1098, the title of "Duke of Zähringen" was created for him, in use from c. 1100 and continued by his successors until 1218.
Fricktal was a canton of the Helvetic Republic from February 1802 to February 1803, consisting of that part of the Breisgau south of the Rhine. Now, the territories of Fricktal form the districts of Rheinfelden and Laufenburg in the canton of Aargau.
Kyburg was a noble family of grafen (counts) in the Duchy of Swabia, a cadet line of the counts of Dillingen, who in the late 12th and early 13th century ruled the County of Kyburg, corresponding to much of what is now Northeastern Switzerland.
Adelaide of Rheinfelden, was Queen Consort of Hungary by marriage to King Ladislaus I of Hungary.
The Counts of Lenzburg were a comital family in the Duchy of Swabia in the 11th and 12th centuries, controlling substantial portions of the pagi of Aargau and Zürichgau.
Adelaide of Savoy, a member of the Burgundian House of Savoy, was Duchess of Swabia from about 1062 until 1079 by her marriage with Rudolf of Rheinfelden, who also was elected German anti-king in 1077.
Agnes of Rheinfelden was the daughter of Rudolf of Rheinfelden, and the wife of Berthold II of Zähringen.
Matilda of Swabia, a member of the Salian dynasty, was the daughter of Emperor Henry III from his second marriage with Agnes of Poitou. By her marriage to Rudolf of Rheinfelden, she was Duchess of Swabia from 1059-1060, before her early death.