The College of Juilly was a Catholic private teaching establishment located in the commune of Juilly, in Seine-et-Marne. Directed by the French Oratorians, it was created in 1638 by the congregationists headed by Father Charles de Condren.
According to the legend, Saint Geneviève stopped in the village of Juilly in 470, and a water source suddenly emerged where she prayed. The spot quickly became a pilgrimage place, and the College was built around it. An abbey established itself there during the 12th century, while Blanche of Castile, the mother of Saint-Louis, decided in the 13th century to establish there an orphanage which hosted the children of those knights killed during the Crusades. Joan of Arc might have sojourned there while coming back from Orleans.
Wikipedia https://en.wikipedia.org/wiki/College_of_Juilly
Address 7 Rue Barre, Juilly 77230, France
Coordinates 49°0'41.765" N 2°42'20.04" E