Saint Euphrosyne of Polotsk (†1167) was the daughter of Prince Svyatoslav of Polotsk who founded the Polotsk Savior-Transfiguration women's monastery. She is one of the 15 patron saints of Belarus, whose lives are celebrated in the Belarusian Orthodox Church. Euphrosyne is the only virgin saint of East Slav origin. Her feast day is celebrated on May 23.