[1] The little that is known about Eustadiola is because her biography is documented in the early 8th-century hagiography of her patron, contemporary, and fellow saint, Bishop Sulpicius the Pious, who helped her resist her family's pressure to remarry.
[2][5] Like many wealthy widows of the time, Eustadiola gave away her wealth to the poor, and dedicated the houses she owned as basilicas in honor of the Virgin Mary and the 3rd-century martyr, Saint Eugenia of Rome.
Eustadiola was abbess of the convent she founded, Moyen-Montiers at Bourges, and lived as an ascetic for 70 years, caring for the poor and supporting widows and orphans.
[9] As historian Jo Ann McNamara said, "She was full of faith, ablaze with charity, affable of speech, amicable of aspect, endowed with prudence, famed for temperance, firm with internal fortitude, steady with just censures, great of spirit, robust with patience and gentle in humility".
[7] According to McNamara, "such proof of divine favor" helped protect Eustadiola's wealth from those who would prevent her from using it to support her communities and charitable works, and provided her with "prestige as a mediator in settling local quarrels".
[2] According to writer Jane T. Schulenburg, Eustadiola, like many abbesses and saints of her day, was praised for enlarging her churches and monastic buildings, for her role in obtaining relics for them, and for decorating and enriching their appearance.