Anastasius I

Anastasius defeated the Isaurian rebels who had opposed his accession. The war ended with the capture and execution of the rebel leaders, and the Isaurians were forcibly resettled, ending their threat to imperial authority.

Emperor Anastasius I abolished the chrysargyron, a highly unpopular tax on trade and commerce that was collected every four years. This reform, along with others, improved the financial stability of the empire and left a substantial surplus in the treasury upon his death.

Anastasius introduced a new system of bronze coinage, including the follis and its fractions. This reform stabilized the currency and facilitated trade, becoming a standard for Byzantine coinage for centuries.

Anastasius ordered the construction of a long defensive wall, the Anastasian Wall, stretching from the Sea of Marmara to the Black Sea. The wall was intended to protect Constantinople from barbarian incursions, but it proved difficult to maintain and was eventually abandoned.