During his reign, around 810, the schismatic Barsanuphians were brought back into the Coptic fold.[1] Mark baptized their leaders, George and Abraham, at the monastery of Saint Mina and consecrated them as orthodox bishops (albeit without dioceses).[1][2] Mark later appointed George to the diocese of Tanbudha and Abraham to that of Atripe.[2] Mark also rebuilt and reconsecrated one of the former churches of the Barsanuphians.[3][4]