Palisade is a row of closely placed vertical tree trunks or stakes. Height ranges from 1m to 3-4m. Derives from Latin 'pālus', meaning stake
Built in early fifth century AD by Emperor Theodosius II. Measured approximately 12 km in length. Consisted of three defensive lines: moat, outer wall, and inner wall. Inner wall reached 12 meters height and 5 meters thickness
First Greek walls surrounded Akropolis, 35 stades long with 27 catapult towers. Roman emperor Severus rebuilt city in 203, walls 300m west. Constantine's new walls built in 324, 6 km² area, 40,000 POWs
Theodosian Walls were built during Theodosius II's reign (408-450 CE). The Golden Gate was constructed by Theodosius I in 391 CE. The walls were completed in 439 CE, stretching 6.5 kilometres