He was the thirty-sixth bishop of Toul, succeeding Robert.
The clergy of Toul confirmed his nomination by Otto III, Holy Roman Emperor due to his piety.
He was consecrated on 3 October 995 by Ludolf of Trier, who proposed that he model his life on his predecessor Gerard of Toul.
Five-year-old Bruno of Egisheim-Dagsburg, son of Emperor Conrad II's first cousin, Count Hugo, was entrusted to Bishop Berthold to be educated.
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