 Complete the following phrase:  He was a prominent member of the Council of Basel since 1432 and together with Cardinal Julian Cesarini led the forces that maintained the power of the general councils over the popes own control of the Church. It was while the council was proceeding that he tended to victims of the plague. He later led opposition to the pope but Cesarini was reconciled with Pope Eugene IV and had a prominent part in the popes convoked 