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Simon I
Simon I
	+ SYMON GRA[TIA] D[E]I LOTHARINGORUM DUX ET MARCHIO
Duke of Lorraine
Reign	1115 - 1138
Predecessor	Theodoric II
Successor	Matthias I
Born	1076
Died	13 January 1139
Burial	Saint-Dié
Spouse	Adelaide of Leuven
Issue	Matthias I, Duke of Lorraine; Agatha of Lorraine
House	Metz
Father	Theodoric II, Duke of Lorraine
Mother	Hedwig of Formbach

Simon I (1076 – 13 or 14 January 1139) was the duke of Lorraine from 1115 to his death, the eldest son and successor of Theodoric II and Hedwig of Formbach and a half-brother of Emperor Lothair III.^[1]

Continuing the policy of friendship with the Holy Roman Emperor, he accompanied the Emperor Henry V to the Diet of Worms of 1122, where the Investiture Controversy was resolved.

He had stormy relations with the episcopates of his realm: fighting with Stephen of Bar, bishop of Metz, and Adalberon, archbishop of Trier, both allies of the count of Bar, whose claim to Lorraine against Simon's father had been quashed by Henry V's father Henry IV. Though Adalberon excommunicated him, Pope Innocent II lifted it. He was a friend of Bernard of Clairvaux and he built many abbeys in his duchy, including that of Sturzelbronn in 1135. There was he interred after his original burial in Saint-Dié.

Children of Simon and Adelaide

Simon I of Lorraine married his step-sister, Adelaide,^[2] daughter of Henry III of Leuven. Their children were:

Matthias, his successor in Lorraine^[3]
Robert, lord of Floranges (near Thionville)
Agatha of Lorraine, married Reginald III, Count of Burgundy (Renaud III), the first Free Count^[4]
Hedwige, married Frederick III, count of Toul
Bertha, married Margrave Hermann III of Baden
Mathilde, married Gottfried I, Count of Sponheim
Baldwin
John

Bogdan, Henry (2007). La Lorraine des ducs (in French). Perrin.
Poole, Austin Lane (1927). "England and Burgundy in the last decade of the twelfth century". In Davis, H.W.C. (ed.). Essays in History Presented to Reginald Lane Poole. Oxford at the Clarendon Press. pp. 261–273.

Simon I, Duke of Lorraine House of Metz Born: 1076 Died: 13 April 1138
Preceded by Theodoric II	Duke of Lorraine 1115–1138	Succeeded by Matthias I