300 000 Zlotys Zamek w Łańcucie

The Łańcut Castle series was part of a broader NBP program in the early 1990s to generate hard currency through collector coin exports — Poland was still restructuring its economy following the end of communist rule, and foreign numismatic sales provided a modest but real source of convertible income. The 300,000 złoty denomination itself became obsolete almost immediately; redenomination in 1995 replaced 10,000 old złotych with one new złoty, rendering these face values historical artifacts within two years of striking.