Aerarium

Aerarium (from Latin "aes", in its derived sense of "money") was the name (in full, "aerarium stabulum" - treasure-house) given in Ancient Rome to the public treasury, and in a secondary sense to the public finances.
Aerarium populi Romani
The treasury contained the monies and accounts of the state finances. It also held the standards of the legions; the public laws engraved on brass, the decrees of the Senate and other papers and registers of importance.
These public treasures were deposited in the temple of Saturn at the Forum Romanum, on the eastern slope of the Capitoline Hill. During the republic, they were in the charge of the urban quaestors, under the supervision and control of the Senate.
This arrangement continued (except for the year 43 BC, when no quaestors were chosen) until 28 BC, when Augustus transferred the aerarium to two praefecti aerarii, chosen annually by the Senate from ex-praetors. In 23 these were replaced by...