Otto I, Landgrave of Hesse

Otto I
Landgrave of Hesse
Spouse(s)	Adelheid of Ravensberg
Issue
Henry II the Iron Otto, Archbishop of Magdeburg Louis the Junker Hermann I the Elder Elisabeth
Detail Titles and styles
The Landgrave of Hesse
Noble family	House of Hesse
Father	Henry I, Landgrave of Hesse
Mother	Adelheid of Brunswick-Lüneburg
Born	Marburg 1272
Died	17 January 1328

Otto I of Hesse (c. 1272, Marburg–17 January 1328), Landgrave of Hesse.

He was a son of Henry I, Landgrave of Hesse and his first wife Adelheid of Brunswick-Lunenburg. Following the death of his father in 1308, he inherited Upper Hesse, the "Land on the Lahn", which included Marburg, Giessen, Grünberg and Alsfeld. After his half-brother John died in 1311, he also became landgrave of Lower Hesse. This included the area below Fulda, Eder, Schwalm, Werra, and the upper reaches of the Weser, with the residence of Kassel, as well as the towns of Homberg (Efze), Melsungen, and Rotenburg an der Fulda.

After Otto inherited the whole Landgraviate, he resided alternately in Kassel and Marburg. Otto had a long conflict with the Archbishop of Mainz, Matthias von Bucheck. In 1324 Mainz won the battle in the Lahnberg with help from troops from Amöneburg. In 1327, Mainz adopted Giessen with the help of troops from the Electorate of Trier, but the citizens of the town quickly enabled Otto to regain control. Only after Otto's victory at Wetzlar and with the mediation of King John of Luxembourg in 1328 was conciliation made possible.

Otto died on 17 January 1328 in Kassel and was buried in the Ahnaberg monastery.

Family and children

He was married 1297 in Saint Elisabethkirche, Marburg to Adelheid of Ravensberg, daughter of Count Otto III of Ravensberg and had the following children:

1. Henry II the Iron (d. 3 June 1376, Kassel).
2. Otto (1301–1361, Wolmirstedt), Archbishop of Magdeburg.
3. Louis the Junker (d. 2 February 1345). Father of Hermann II of Hesse.
4. Hermann I the Elder (d. 1368/70).
5. Elisabeth (d. 30 May 1373), married before 8 May 1336 to Duke Rudolf II of Saxony.

Preceded by Henry I the Child

Landgrave of Hesse 1308–1328

Succeeded by Henry II the Iron

Persondata
Name	Otto I, Landgrave Of Hesse
Alternative names
Short description
Date of birth
Place of birth	1272
Date of death	17 January 1328
Place of death