The other sketch comes to us in medieval Latin from Marbod of Rennes (d. 1123). Thaïs also appears in Greek martyrologies by Maurolychus and Greven, however, not in Latin martyrologies.[1] The lives of the desert saints and hermits of Egypt, including St. Thaïs, were collected in the Vitae Patrum (Lives of the Desert Fathers).[2][3]