Final answer:
Vespasian implemented a variety of financial reforms as a Roman Emperor, including taxing public urinals, which was a clever way to increase state revenue.
Step-by-step explanation:
Vespasian was a Roman Emperor renowned for his military prowess and his stabilization of the Empire's finances. One of his notable financial reforms was the institution of a tax on public urinals. When his son Titus criticized the tax, Vespasian famously demonstrated that money does not smell by holding out a handful of coins gained from the tax, implying that money's value is not tainted by its source.
This taxation policy of Vespasian is an example of how Roman Emperors could be creative in finding new sources of revenue for the state, alongside other measures such as taxing conquered rulers or the sale of salt.