شارل حلو
The castle was built upon a promontory on the sea, to the north of the ancient Tell of Beirut and west of the present-day intersection of Charles Helou Avenue and Al-Shuhada Street. A separate fortification known as "Burj al-Musallah" was built on an islet that was located roughly on the intersection of Helou Avenue and Foch Street. In the Crusader period, a 6-meter-wide moat separated the southwestern tower from the lower city, thus protecting the castle from attacks.