Family
Helena married King Stefan Uroš I of Serbia around 1245–1250. Her children included Stefan Dragutin, who reigned as Serbian king from 1276 to 1282; Stefan Uroš II Milutin, who reigned from 1282 to 1321; a further son named Stefan; and a daughter, Brnjača, who became a nun. Both Dragutin and Milutin are venerated as saints, and Helena is most commonly identified in the synaxarion as their mother.
Her own parents are recorded as John Angelos of Syrmia and Matilda of Požega. While her hagiographer Archbishop Danilo II describes her family as French, modern genealogical research has proposed descent through these parents from the Byzantine House of Angelos and the Hungarian House of Árpád.
Charity and Care for the Poor
After the death of her husband, Helena devoted her life to pious deeds. The synaxarion relates that she built a shelter for the poor and established monastic houses for those who wished to live in purity and virginity. Near the city of Spich she founded the Rechesk monastery.
She is also credited with establishing the first girls' school in medieval Serbia, maintaining a court library, and encouraging the transcription of monastic books.
Patronage of Churches and Monasteries
Helena was a notable founder and benefactress of religious houses. Her endowments included Gradac Monastery, the Church of St. Nicholas in Skadar, and the Monastery of Saints Sergius and Bacchus. She also repaired churches that had been devastated by the Mongol invasion of 1242.
Gradac Monastery, built between 1277 and 1282 during the reign of her son Dragutin, has its main church dedicated to the Entry of the Most Holy Theotokos into the Temple. Helena's frescoes also appear at Gračanica Monastery.
Governance and Religious Tolerance
As dowager-queen Helena administered the provinces of Zeta and Travunia until 1308. These regions held a mixed population of Serbian Orthodox and Roman Catholic Christians, and she became known for religious tolerance in governing them.
Relics & Shrines
Helena was buried at Gradac Monastery, her own foundation. The monastery was devastated in the late fourteenth century and partially restored in the sixteenth century. Monks fleeing the Turks departed taking with them the holy relics of their founder, and the current location of her relics is unknown.