see their emperor sharing their enjoyment of the races, alongside his family and images of the gods, At some time during 108 or 109, Trajan held 123 days of games to celebrate his Dacian victory. They involved "fully 10,000" gladiators, and the slaughter of thousands, "possibly tens of thousands" of animals, both wild and domestic. Trajan's careful management of public spectacles led the orator Fronto to congratulate him for paying equal attention to public entertainments and more serious issues, acknowledging that "neglect of serious matters can cause greater damage, but neglect of amusements greater discontent". State-funded public entertainments helped to maintain contentment among the populace; the more "serious matter" of the corn dole aimed to satisfy individuals. Christians During the period of peace that followed the Dacian war, Trajan exchanged letters with Pliny the Younger on how best to deal with the Christians of Pontus. Trajan told Pliny to continue prosecutions of Christians if they merited that, but not to accept anonymous or malicious denunciations. He considered this to be in the interests of justice, and to reflect "the spirit of the age". Non-citizens who admitted to being Christians and refused to recant were to be executed "for obstinacy". Citizens were sent to Rome for trial. Currency and welfare In 107, Trajan devalued the Roman currency, decreasing the silver content of the denarius from 93.5% to 89.0%the actual silver weight dropping from 3.04grams to 2.88grams. This devaluation, along with the massive amounts of gold and silver acquired through his Dacian wars, allowed Trajan to mint many more denarii than his predecessors. He also withdrew from circulation silver denarii minted before Nero's devaluation. Trajan's devaluation may have had a political intent, enabling planned increases in civil and military spending. Trajan formalised the alimenta, a welfare program that helped orphans and poor children throughout Italy by providing cash, food and subsidized education. The program was supported out of Dacian War booty, estate taxes and philanthropy. The alimenta also relied indirectly on mortgages secured against Italian farms (fundi). Registered landowners received a lump sum from the imperial treasury, and in return were expected to repay an annual sum to support the alimentary fund. Military campaigns Conquest of Dacia Trajan took the Roman empire to its greatest expanse. The earliest conquests were Rome's two wars against Dacia, an area that had troubled Roman politics for over a decade in regard to the unstable peace