Geilo (bishop)
French bishop
Geilo (or Geylo, French Gilon) (died 28 June 888) was the Bishop of Langres from 880 until his death. His episcopate coincided mostly with the emperorship of Charles the Fat and after 885 he is a leading ecclesiastical figure at the imperial court. Geilo increased the landholdings and comital rights of the diocese of Langres immensely in his short tenure, a sign of political sagacity. Geilo has been painted as a villain, an ambitious prelate trying to extend his see's temporal authority as far as it could go under the reign of weak Carolingians.
Geilo was the son and namesake of Count Geilo. He was the abbot of Flavigny from 866 until 870, and of Tournus during the last years of the reign of Charles the Bald. In 879, he crowned Boso of Provence in Mantaille; Boso in turn made him Bishop of Langres. He quickly changed sides and supported Carloman II in 880, being confirmed in his diocese, and even staying with the king at the siege of Vienne throughout the year.
When Carloman died in 884, Geilo was instrumental in bringing Charles the Fat to the throne in West Francia. It is likely that he in fact crowned Charles rex in Gallia on 20 May 885 at Grand in his diocese.
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