The Prague groschen was a silver coin that was very common throughout the Medieval Central Europe. Minting of Prague Groshen coins started around 1300 after rich silver mines had been discovered in the Kutna Hora region during the reign of the Bohemian king Wenceslas II. Because of high amount of silver in the coin it became one of the most popular of the Groschen-type coins in the medieval Europe. Size: cca 3 cm.