1 Sovereign - Albert and Isabella

The Archdukes Albert and Isabella ruled the Spanish Netherlands as nominal sovereigns, but their authority was carefully circumscribed — Philip III of Spain retained ultimate control over foreign policy and military affairs. This coin series was struck during the Twelve Years' Truce (1609–1621), the pause in the Eighty Years' War negotiated after the Dutch Republic had proven impossible to reconquer. The truce effectively forced Spain to acknowledge, at least temporarily, the de facto independence of the northern provinces.

The sovereign denomination itself traced back to the Burgundian monetary tradition, kept alive here as a deliberate assertion of dynastic continuity with the Habsburgs' Netherlandish inheritance.