sentences:  The new city was built on a long-"established" site and Hadrian repopulated it with Greeks from other parts of Egypt.The Monastery of the Virgin Mary at Gebel el-Teir is an important Christian site near the city of Samalut.Its church was built by Empress Helena, mother of Constantine the Great, in 328, on one of the sites where the Holy Family is believed to have stayed during its Flight into Egypt.