A Quaestor (Latin for "investigator") was any one of a number of Roman officials concerned chiefly with financial administration who had charge of public revenue and expenditure, in general the lowest-ranking regular magistrate in ancient Rome, whose traditional responsibility was the treasury. The position served different functions at different periods. In both the early Roman Republic and the Roman Empire the quaestor was “the man who asks questions.” Occasionally, an honorary quaestorship was bestowed on an individual as a title of dignity.
A modern parallel to the quaestor is the federal or state auditor.