The sea walls in the Seraglio Point area are the oldest part of the city walls ; while the triple land walls of Theodosius II at the western end of the city are the strongest parts .
The Seraglio Point area have continuously existed since Lygos and Byzantium .
The sea walls in the Seraglio Point area , which have continuously existed since Lygos and Byzantium , are the oldest part of the city walls ; while the triple land walls of Theodosius II at the western end of the city are the strongest parts .