By: Professor B. Slick, Esq.
In ancient Mesopotamia, the Sumerians developed the first known tax loophole:
In ancient Rome, the Roman Empire developed the "Villa Loophole": wealthy Romans would build their homes in areas that were technically outside the city limits, thereby avoiding city taxes.
See a list of notable Villa Loopholes in the Roman Empire
In modern times, the "Double Exemption Loophole" was used by a certain Enron executive to hide billions of dollars in tax evasion, resulting in the largest corporate bankruptcy in history.