It took two wars, but as we saw last time, the emperor Trajan finally got the job done in Dacia. By the year AD 107, the crafty Dacian king was dead, and Rome had itself a new province—one supposedly flush with gold and silver. And with Trajan’s new one-kilometer long bridge across the broad Danube River, Roman soldiers, merchants, workers and government officials would have no trouble exploiting Dacia for all it was worth. So suddenly, Trajan had several extra zeros in his imperial bank account; and with this new money, Trajan launched into a monumental construction campaign that remade the centre of Rome…