The Philadelphion was a public square located in Constantinople (today's Istanbul). After passing the Forum of Theodosius, the Mese Odos (the main road of Constantinople) branched into two directions. One led to the quarter known today as Yedikule, via the Aksaray and Cerrahpaşa quarters. The other passed through the quarters of Şehzadebaşı and Fatih until reaching the quarter of Edirnekapı (formerly the Gate of Charisius).