Poland

The złoty is subdivided into 100 grosz. It is the most traded currency in Central and Eastern Europe and ranks 22nd most-traded in the foreign exchange market.
The word złoty is a masculine form of the Polish adjective ‘golden’, which closely relates with its name to the guilder whereas the grosz subunit was based on the groschen, cognate to the English word groat. It was officially introduced to replace its predecessor, the Polish mark, on 28 February 1919 and began circulation in 1924.