Frederick I, Duke of Upper Lorraine

Frederick I (c. 912 – 18 May 978) was the count of Bar and duke of Upper Lorraine.

In 954, he married Beatrice, daughter of Hugh the Great, count of Paris, and Hedwig of Saxony.

To stop incursions from the duchy of Champagne, Frederick constructed a castle over the Ornain River in 960, and later occupied the confiscated lands of Saint-Mihiel.

The duchy of Lorraine was at that time governed by the archbishop of Cologne, Bruno, who was called the archduke on account of his dual title.

In 959, Bruno, in concert with his brother, Emperor Otto I, divided the duchy, appointing as margraves: Godfrey in Lower Lorraine and Frederick in Upper Lorraine.