Heller - Ferdinand I Kuttenberg

Ferdinand I inherited the Bohemian crown in 1526 following the death of Louis II at Mohács — the battle that effectively ended the Jagiellonian dynasty and handed the Habsburgs control of Bohemia, Hungary, and the associated mint apparatus in a single catastrophic afternoon. The Kuttenberg mint, Bohemia's most productive silver facility, was among the first institutions Ferdinand moved to consolidate under direct Habsburg oversight.

The heller denomination by this period was already archaic — a fractional relic kept in production largely for local market transactions where smaller change was still demanded.