At the start of Justinian I's reign he had inherited a surplus 28,800,000 "solidi" (400,000 pounds of gold) in the imperial treasury from Anastasius I and Justin I. Under Justinian's rule, measures were taken to counter corruption in the provinces and to make tax collection more efficient. Greater administrative power was given to both the leaders of the prefectures and of the provinces, while power was taken away from the vicariates of the dioceses, of which a number were abolished. The overall trend was towards a simplification of administrative infrastructure. According to Brown (1971), the increased professionalization of tax collection did much to destroy the traditional structures of provincial life, as it weakened the autonomy of the town councils in the Greek towns. It has been estimated that before Justinian I's reconquests the state had an annual revenue of 5,000,000 "solidi" in AD 530, but after his reconquests, the annual revenue was increased to 6,000,000 "solidi" in AD 550.