Choniates criticised Manuel for raising taxes and pointed to Manuel's reign as a period of excess; according to Choniates, the money thus raised was spent lavishly at the cost of his citizens. Whether one reads the Greek encomiastic sources, or the Latin and oriental sources, the impression is consistent with Choniates' picture of an emperor who spent lavishly in all available ways, rarely economising in one sector in order to develop another. Manuel spared no expense on the army, the navy, diplomacy, ceremonial, palace-building, the Komnenian family, and other seekers of patronage. A significant amount of this expenditure was pure financial loss to the Empire, like the subsidies poured into Italy and the crusader states, and the sums spent on the failed expeditions of 1155–1156, 1169 and 1176. The problems this created were counterbalanced to some extent by his successes, particularly in the Balkans; Manuel extended the frontiers of his Empire in the Balkan region, ensuring security for the whole of Greece and Bulgaria. Had he been more successful in all his ventures, he would have controlled not only the most productive farmland around the Eastern Mediterranean and Adriatic seas, but also the entire trading facilities of the area. Even if he did not achieve his ambitious goals, his wars against Hungary brought him control of the Dalmatian coast, the rich agricultural region of Sirmium, and the Danube trade route from Hungary to the Black Sea. His Balkan expeditions are said to have taken great booty in slaves and livestock; Kinnamos was impressed by the amount of arms taken from the Hungarian dead after the battle of 1167. And even if Manuel's wars against the Turks probably realised a net loss, his commanders took livestock and captives on at least two occasions. This allowed the Western provinces to flourish in an economic revival that had begun in the time of his grandfather Alexios I and continued till the close of the century. Indeed, it has been argued that Byzantium in the 12th century was richer and more prosperous than at any time since the Persian invasion during the reign of Herakleios, some five hundred years earlier. There is good evidence from this period of new construction and new churches, even in remote areas, strongly suggesting that wealth was widespread. Trade was also flourishing; it has been estimated that the population of Constantinople, the biggest commercial centre of the Empire, was