I want to know the answer to the following question:
What type of weapon is the Polybolos?
All the background I'm provided with is that "Demetrius Poliorcetes was notorious for the large siege engines employed in his campaigns, especially during the 12-month siege of Rhodes when he had Epimachos of Athens build a massive 160 ton siege tower named Helepolis, filled with artillery.". Is that enough to answer the question?
Answer: no