Résumé :
I (Ath. Iber. 209) is a complex manuscript, containing different authors (Euripides, Ae- schylus, Dionysius Periegetas, Theocritus, Tzetzes and Pindar), each written by (one or more) different scribes. The scholia to the Persae preserved by this ms. are written by several hands (I1-5, Ib). Among these, the earlier ones are I1 and Ib: the first one had at his disposal a ms. with scholia vetera of Medi- cean type and can be assigned to the first half of the 13th century, while the second one uses an anti- graphon with Φ scholia and can be dated around the mid 13th century. The other hands integrated their work adding some further annotations, what places it in a learned environment. Some hypothesis are proposed on the composition and history of the manuscript, with a particular focus on its employment within the Bessarion’s circle.