It’s not music or philosophy, but this activity is the focus of the sole extant work by the Greek writer Aeneas, whose nickname is often misspelled “Tacitus.” This activity is the subject of a work with three-dimensional sketches by Hero of Byzantium, who suggests using chelonai (“kuh-LOH-nigh”). Heraclides (“heh-rah-KLAI-deez”) of Tarentum invented the sambuca for this activity. Abandoned equipment that was originally used for this activity was sold to finance a monumental statue designed by Chares (“CARE-eez”) of Lindos. A huge device called a helepolis (“heh-LEH-poh-lis”) was used for this activity by Demetrius I of Macedon, whose innovations in this activity inspired his nickname Poliorcetes (“poh-lee-or-kay-TAYS”). When traditional methods of this activity failed, Alexander the Great built a (10[1])kilometer-long causeway to reach the city of Tyre. For 10 points, machines like the ballista and the battering ram were used to take fortified cities in what sort of military activity? ■END■