20 Nummi - Phocas Constantinopolis

Phocas seized the throne in 602 by leading a mutiny of Danubian frontier troops against Maurice, then had Maurice and his five sons executed on the shore of the Bosphorus. His eight-year reign was defined by military collapse on multiple fronts and internal purges severe enough to destabilize the administrative apparatus the eastern empire had spent centuries building. The Persian Sassanid king Khosrow II used Maurice's murder as pretext for a war of conquest that would not end until Heraclius deposed Phocas in 610 — by which point Byzantine Asia Minor was already being systematically stripped away.

Constantinople's mint continued striking throughout, though output quality degraded noticeably across the reign.