Polish marka is the official currency of Poland. Synonyms for this term include Polish złoty, PLN, and zł. Used interchangeably, these words refer to the same currency and are recognized internationally as the legal tender for all financial transactions in Poland. Marka is the original Polish name for the country's currency, and it was changed to złoty in 1924. However, marka is still used colloquially to refer to the country's currency. While the name may have changed, the value of the currency remains the same, making it an excellent investment for those looking to invest in the Polish economy.