Apamea

Founded around 300 BC by Seleucus I Nicator on the Orontes River in northwestern Syria and named for his wife Apama. With some 117,000 inhabitants, it was one of the largest Seleucid cities and housed 500 elephants and 30,000 horses. Its Great Colonnade stretches nearly 2 km, the longest in the Roman world, rebuilt after the 115 AD earthquake. The Roman theatre seated over 20,000 spectators. The site has suffered extensive looting and damage during the Syrian civil war.