She specialized in Hellenistic Judaism and primitive Christianity and the persecution faced by the two religious groups.
Baslez was born on 5 May 1946 in Angers and took preparatory classes in Versailles before enrolling at the École normale supérieure de jeunes filles in 1966.
[1] After earning an agrégation in history, she defended her thesis under the direction of the Hellenist André Laronde.
[4] A member of the Association catholique française pour l'étude de la Bible [fr], Baslez published numerous books and articles and edited Les premiers temps de l'Église for Éditions Gallimard.
A professor at Paris-Sorbonne University,[5] she directed a seminar at the École normale supérieure titled "Religions et sociétés dans le monde gréco-romain".