Mainz-Kostheim is a district administered by the city of

Wiesbaden Wiesbaden () is a city in central western Germany and the capital of the state of Hesse. , it had 290,955 inhabitants, plus approximately 21,000 United States citizens (mostly associated with the United States Army). The Wiesbaden urban area ...

, Germany. Its population is 14,381 (). Mainz-Kostheim was formerly a district of the city of

Mainz Mainz () is the capital and largest city of Rhineland-Palatinate, Germany. Mainz is on the left bank of the Rhine, opposite to the place that the Main (river), Main joins the Rhine. Downstream of the confluence, the Rhine flows to the north-we ...

, until the public administration by the city of

was decided on 10 August 1945. The reason for this had been the easy control of the

Allied Occupation Zones in Germany Germany was already de facto occupied by the Allies from the real fall of Nazi Germany in World War II on 8 May 1945 to the establishment of the East Germany on 7 October 1949. The Allies (United States, United Kingdom, Soviet Union, and France ...

, where the Rhine formed the border between the American sector and the French sector. Mainz-Kostheim faces the city of Mainz on the opposite shore of the

Rhine ), Surselva, Graubünden, Switzerland , source1_coordinates= , source1_elevation = , source2 = Rein Posteriur/Hinterrhein , source2_location = Paradies Glacier, Graubünden, Switzerland , source2_coordinates= , so ...

river. In 1184

Frederick I, Holy Roman Emperor Frederick Barbarossa (December 1122 – 10 June 1190), also known as Frederick I (german: link=no, Friedrich I, it, Federico I), was the Holy Roman Emperor from 1155 until his death 35 years later. He was elected King of Germany in Frankfurt on ...

held one of the biggest diets of the Middle Ages at the Maaraue in Kostheim, the

Diet of Pentecost The ''Mainzer Hoffest'' (literally "Mainz court festival") or Diet of Pentecost was a ''Hoftag'' (imperial diet) of the Holy Roman Empire started in Mainz on 20 May 1184.Knighthood A knight is a person granted an honorary title of knighthood by a head of state (including the Pope) or representative for service to the monarch, the church or the country, especially in a military capacity. Knighthood finds origins in the Gr ...

of is both sons

Henry Henry may refer to: People *Henry (given name) * Henry (surname) * Henry Lau, Canadian singer and musician who performs under the mononym Henry Royalty * Portuguese royalty ** King-Cardinal Henry, King of Portugal ** Henry, Count of Portugal, ...

hand Frederic,

Duke of Swabia 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 ...

. During the Siege of Mainz by Prussian and Austrian troops in the

Napoleonic Wars The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of Fren ...

Kostheim had been severely damaged several times. In the cause of the

bombing of Mainz in World War II The German city of Mainz was bombed in multiple air raids by the Allies during World War II by the Royal Air Force (RAF), as well as the United States Army Air Forces. These led to numerous victims and heavy damage throughout the cityscape. Ove ...

Mainz-Kostheim was subject to air raids.

The Linde Group Linde plc is a global multinational chemical company founded in Germany and, since 2018, domiciled in Ireland and headquartered in the United Kingdom. Linde is the world's largest industrial gas company by market share and revenue. It serves ...

has been located in Kostheim before recent mergers, acquisitions and transition.

Twin towns – sister cities

Mainz-Kostheim is twinned with: * Sankt Veit an der Glan, Austria

References

Boroughs of Wiesbaden Divided cities Former boroughs of Mainz Rheingau {{Hesse-geo-stub