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Birth:          ABT 1117 of Kelheim, Niederbavern, Bavaria
Death:          1 Jul 1183 Pettendorf
Burial:         Scheyern

Notes
ancestor of the rulers of Bavaria up through 1918
advocate of Weihenstefan
went with his father on second Crusade in 1147
in 1159 with the Emperor Frederick Barbarossa as Imperial Standard Bearer
fougt in the Italian wars
ambassador to Constantinople, present in Venice at the peace between Barbarossa 
and the pope in 1177
m 1159/1167
https://en.wikipedia.org/wiki/Otto_I,_Duke_of_Bavaria
Otto I (1117 – 11 July 1183), called the Redhead (German: der Rotkopf), was Duke of 
Bavaria from 1180 until his death. He was also called Otto VI as Count Palatine of 
Bavaria from 1156 to 1180. He was the first Bavarian ruler from the House of 
Wittelsbach, a dynasty which reigned until the abdication of King Ludwig III of Bavaria 
in the German Revolution of 1918.

Life[edit]

Duke Otto I was probably born at Kelheim, the son of Count Palatine Otto IV of 
Wittelsbach and Heilika of Pettendorf-Lengenfeld, a granddaughter of the 
Hohenstaufen duke Frederick I of Swabia. He was the brother of Archbishop Conrad I 
of Mainz and Salzburg. Upon the death of his father in 1156, he succeeded him as 
Count palatine of the Bavarian duchy, then under the rule of Henry the Lion, a scion 
of the Welf dynasty.

As one of the best knights in the employ of Emperor Frederick Barbarossa in 1155 he 
had prevented a defeat of the Emperor near Verona, where the army caravan was 
ambushed on the way back to Germany after the coronation at Rome. In the Dominium 
mundi conflict between emperor and pope culminating at the 1157 Reichstag of 
Besanηon (Bisanz), fiery Otto could only be kept from smiting the papal legate Cardinal 
Rolando Bandinelli with his battleaxe by the personal intervention of Frederick.

He was finally rewarded with the duchy of Bavaria on 16 September 1180 at Altenburg 
in Thuringia, after the deposition of Duke Henry the Lion. But he was so little regarded 
by many of the Bavarian aristocracy that they are said to have refused him the 
customary homage.[1] They went so far as to refuse to attend his first court assembly 
at Regensburg.[2]

With the separation of Styria under Duke Ottokar IV in the same year, Bavaria lost the 
last of her southeastern territories. With the support of the emperor and his brother 
Conrad, Otto was able to secure the rule of his dynasty from the wary Bavarian 
nobility. His descendants ruled Bavaria for the next 738 years.

In 1182 or 1183, Duke Otto bought Dachau castle, the ministeriales, and all other 
appurtenances for a large sum of cash from the widow of the last duke of Dachau and 
Merania, Conrad II, Duke of Merania.[3]

In 1183 Otto accompanied Emperor Frederick to sign the Peace of Constance with the 
Lombard League and died suddenly on the way back at Pfullendorf in Swabia. He was 
succeeded by his only surviving son Louis. Otto's mortal remains are buried in the 
crypt of Scheyern Abbey.

Issue[edit]

About 1169 Otto married Agnes, a daughter of Count Louis I of Loon. Agnes and Otto 
had the following children:
Otto (1169–1181)
Ulrich († 29 May...)
Agnes († 13 January...)
Heilika I (b. 1171), married in 1184 to Hallgrave Dietrich of Wasserburg
Agnes (1172–1200), married Count Henry of Plain (d. 1190)
Richardis (1173–1231), married in 1186 to Count Otto I of Guelders and Zutphen
Louis I (1173–1231), married in 1204 to Ludmilla of Bohemia
Heilika II (b. 1176), married Count Adelbert III of Dillingen (d. 1214)
Elisabeth (b. 1178), married Count Berthold II of Vohburg (d. 1209)
Mechtild (1180–1231), married in 1209 to Count Rapoto II of Ortenburg (1164–1231).
Sophia (1170–1238), married Landgrave Hermann I of Thuringia (1155–1217)

Parents
VON WITTLESBACH Otto IV (ABT 1085 - 4 Aug 1156)
VON PETTENDORF OF LENGENFELD Heilika (ABT 1103 - 13 Sep 1170)

Siblings
____ Otto I (V) (ABT 1117 - 1 Jul 1183)
OF WITTELSBACH Hedwig (ABT 1130 - 16 Jul 1174)

Marriage To VON LOOS [OF LOON] Agnes (ABT 1146 - 26 Mar 1191)
    m. ABT 1162 

Notes

Parents
____ Louis I (ABT 1122 - 11 Aug 1171)
VON METZ Agnes (ABT 1114 - ABT 1178)

Children by VON LOOS [OF LOON] Agnes ABT 1146 - 26 Mar 1191
VON WITTLESBACH Richardis (ABT 1163 - 7 Sep 1231)

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