Career
Before that he functioned as Bishop of Eger from 1047 to 1075. His name appears in the founding charter of the Abbey of Garamszentbenedek. King Ladislaus I was crowned by Nehémiás in 1075.
He received a letter from Pope Gregory VII to send "worthier" envoys to the papal court. Pope Gregory also asked Nehémiás and Ladislaus for a better offer in exchange for recognition of the Hungarian power. During that time the Investiture Controversy started between the Pope and the Holy Roman Empire.
Gregory VII also demanded vassalage from the Hungarian king.