I found in Coptic Synaxarium for June 26 the commemoration of Pope Archelaus, 18th Pope of Alexandria.
In his biography is written that he accepted Arius in the church against the command of his predecessor Pope Peter the Seal of Martyrs. Because of this he did not remain on the Chair longer than 6 months, then departed.
At the end of his biography is written: " May his prayers be with us. Amen."
It is not mentioned that he repented from this sin. Can you clarify me is he saint or not? And how did he right a wrong?