Complex sentence: The treasury contained the monies and accounts of the state finances, and also the standards of the legions; the public laws engraved on brass, the decrees of the Senate and other papers and registers of importance.
Split into simpler sentences: 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.