Some letters preserved in the Acts of the Council of Chalcedon (and here translated for the first time into Italian), addressed by Marcian and his wife to the fathers in the year 451 with the invitation to move from Nicaea to Chalcedon, they allow us to observe the very conciliatory normative style of the prince in communicating with the bishops, although little prompt in obeying imperial orders: a way to operate very different from the authoritarian and strongly used usually used to write laws.