Justinian I's reign saw the follis system reorganized under the currency reform of 538 AD, which rationalized fractional denominations across the eastern mints. Thessalonica operated as a secondary mint to Constantinople, its output distinguishable by mint mark and generally lower in volume than the capital's production. The 16 nummi — equivalent to a quarter follis — occupied the lowest practical tier of everyday bronze exchange.
Justinian I's reign saw the follis system reorganized under the currency reform of 538 AD, which rationalized fractional denominations across the eastern mints. Thessalonica operated as a secondary mint to Constantinople, its output distinguishable by mint mark and generally lower in volume than the capital's production. The 16 nummi — equivalent to a quarter follis — occupied the lowest practical tier of everyday bronze exchange.