Tag: Emperor Trajan

Apollodorus’s Siege Tower

An illustration from a Byzantine copy of Apollodorus of Damascus’s “Πολιορκητικά” showing a siege tower with an assault bridge for scaling walls. This drawing is from BNF suppl. gr. 607, fol. 38r, a manuscript dated sometime between the 11th and 14th centuries.

Apollodorus of Damascus is generally thought to have written the “Πολιορκητικά,” a treatise on siege engines, addressed to an unnamed emperor (probably Trajan). The text first treats siege engines used to besiege a hilltop fort, machines to protect troops from objects rolled down the hill as well as devices for protecting men attacking the base of the walls. It describes devices for drilling through walls and setting fire to walls as well as sheds for battering rams. The text also describes towers used to scale walls and invade a fort as well as towers with pivoting arms to sweep defenders off the walls.

This image of a siege tower with bridge is a common illustration in Apollodorus manuscripts, as seen in this 15th-century copy of Apollodorus’s “Πολιορκητικά” in Oxford, Magdalen College, fonds principal gr. 14, fol. 37v

Apollodorus worked on various engineering and building projects for the emperor Trajan in the early second century CE. He was responsible for such projects as Trajan’s Bridge over the Danube during the campaign in Dacia, Trajan’s Column and Trajan’s Forum, various triumphal arches, baths, and other smaller building projects.[1] During Emperor Hadrian’s reign, he was banished and then executed around 130 CE.


  1. He is sometimes given credit for redesigning the imperial residence as well as the Pantheon, but clear evidence is lacking. For a nice post on Apollodorus’s works, see Apollodorus of Damascus: Architect of Empire.  ↩