Abbess of Nisibis
Bryaena led a community of about fifty ascetic women near Nisibis in Mesopotamia. The convent followed the rule laid down by its former abbess, the blessed Platonida, which set aside every Friday for prayer and the reading of the sacred books alone, with no other work undertaken on that day.
The reading of Scripture on these days was ordinarily assigned to her niece Febronia, whose spiritual life became widely known in the city and drew visitors to the convent.
Guardian of Saint Febronia
Febronia was the daughter of Bryaena's brother and had been raised in the monastery from childhood. Concerned above all for her niece's salvation, Bryaena assigned her a stricter form of life than the other sisters, including a severe fast in which she ate only once every other day and rested seated upright rather than in a bed.
According to the sources, mindful of Febronia's exceptional beauty, Bryaena had her read the sacred books to the community from behind a curtain, so that the sisters would not be distracted by her appearance.
The Persecution and Its Aftermath
When a detachment of soldiers approached the convent during the persecution under Diocletian, most of the inhabitants hid; only Bryaena, her helper Thomais, and Febronia—who was gravely ill at the time—remained. Fearing that her niece might fall into the hands of the torturers, Bryaena prayed fervently that the Lord would preserve her and strengthen her in the confession of Christ.
After Febronia's martyrdom, Bryaena collapsed at the sight of her niece's mutilated remains. Recovering, she ordered the convent gates opened so that the faithful could come to venerate the martyr, and she received into the community Hieria, a converted pagan widow who had been drawn to the faith through Febronia, in her niece's place. Thereafter a solemn feast was kept at the convent each year on the day of Febronia's death.