Military / Siege Towers. The Helepolis, the seige tower of Macedonian King Demetrius Poliorcetes (337-283 BC), designed for the seige of Salamis (Clad in iron, over 40m high, 22m square base, nine storeys filled with catapults): Reconstruction. Watercolour, undated, by Peter Connolly. (1935-2012).