Episcopate and church-building
Before his election Martyrius was already established as a monastic founder, having endowed the Transfiguration monastery at Stara Rus in 1192. After his elevation at Kiev in 1193 he became known as a tireless builder and consecrator of churches across the Novgorodian lands.
The sources record a concentrated burst of activity in the mid-1190s: a church of the Mother of God contracted at the city gates in 1195, the consecration of a Resurrection church at a women's monastery by Lake Myachina in 1196, and in January 1197 the consecration of churches of Saint Cyril of Alexandria and Saint Nikephoros together with the founding of a women's monastery dedicated to Saint Euphemia. The stone church of the Transfiguration, begun in May 1198, was consecrated that August.