Monastery of the Annunciation on Lake Vorbozoma
The monastery with which Zosimas is identified was dedicated to the Annunciation of the Most Holy Theotokos and was situated on an island in Lake Vorbozoma, twenty-three versts south of White Lake. It was one of the numerous wilderness-monasteries of the Russian north, modeled on the so-called Trans-Volga communities that were scattered around the great monastery of Saint Cyril of White Lake.
Zosimas is credited with building a wooden church dedicated to the Annunciation and with being most responsible for building up the monastery. One source notes that, contrary to a tradition naming him its founder, he was not in fact the initial founder, though he remained the figure most closely associated with the community's establishment and growth. In 1501 the monastery was headed by Igumen Jonah, described as a disciple of Saint Zosimas (and, in another account, as a successor of Saint Cornelius).