Euphrosyne of Suzdal was a thirteenth-century princess of Rus' who renounced her rank for the monastic life at Suzdal, where she became known for ascetic rigor and spiritual counsel. By tradition she was born in 1212 with the baptismal name Theodoulia, the eldest daughter of Prince Michael of Chernigov, later venerated as a martyr. She is commemorated on September 25, the day of her repose, and on September 18.
According to the synaxarion she was betrothed to Prince Theodore, a brother of Saint Alexander Nevsky, but he died before the marriage could take place. Following this, she entered the Suzdal women's monastery dedicated to the Placing of the Robe of the Mother of God, where she was tonsured with the name Euphrosyne, after Saint Euphrosyne of Alexandria. There she devoted herself to a demanding rule of prayer and abstinence.
The tradition records that her reputation for holiness spread through Suzdal and beyond, drawing many who sought her instruction on prayer, obedience, and humility. After her repose in 1250 her grave became associated with healings, and her formal canonization followed in 1698. She is one of the venerated monastic women of medieval Rus'.
