From her youth she was consecrated to virginity .
According to tradition , she was the daughter of a senator named Philophronos and his wife Theodosia in Chalcedon , located across the Bosporus from the city of Byzantium ( modern - day Istanbul ) .
From daughter 's youth daughter was consecrated to virginity .
According to tradition , she was the daughter of a senator named Philophronos and his wife Theodosia in Chalcedon , located across the Bosporus from the city of Byzantium ( modern - day Istanbul ) .