Episcopate and Mediation
Theoktistos was consecrated by Metropolitan Maximus together with Bishop Simeon of Rostov and Bishop Andrew of Tver. His pastoral work concentrated on the care and building of churches in the Novgorod lands, including the cathedrals he consecrated and his attention to the Monastery of Valaam.
In a period of frequent friction between Novgorod and the principalities, the archbishop served as a peacemaker. The tradition records that he mediated the dispute between Prince Michael of Tver and Novgorod, and that the settlement was preserved in the Theoctist Charter under his seal.