One of Saint Theoctistus’ concerns was the renovation and building of churches. He consecrated cathedrals in the name of Saints Boris and Gleb, and in the name of the Holy Fathers of the First Ecumenical Council. The monastery of Valaam was set in good order during his time.
In the year 1307, because of poor health, the saint withdrew to the Annunciation monastery, where he lived until his death, devoting himself to the ascetic deed of silence. Saint Theoctistus was glorified in 1664, because of the miraculous healings at his relics. In 1786, the relics of the saint were transferred to Yuriev, where Archimandrite Photius built a chapel in his honor at the local cathedral.