He did much to rebuild his Empire after the ravages of the war, and quickly restored the Government finances.The building of the Colosseum was commenced during his reign.A genuine military hero, Trajan was adopted as heir to the throne by Nerva, and became sole ruler of the Roman Empire at the age of 45.He refused to pay the annual tribute to Dacia that had been exacted from Domitian, and then defeated them in battle, so adding Daccia (Hungary, Transylvania etc) to his empire.
After the civil wars of 68-9, he was proclaimed Emperor by his troops, and became sole ruler of the Roman world on the death of Vitellius six months later.The Greek cities continued to produce their own coins for several more centuries under Roman rule.The coins produced during this period are called Roman provincial coins or Greek Imperial Coins.The Archaic period extends from the introduction of coinage to the Greek world during the 7th century BC until the Persian Wars in about 480 BC.The Classical period then began, and lasted until the conquests of Alexander the Great in about 330 BC, which began the Hellenistic period, extending until the Roman absorption of the Greek world in the 1st century BC.