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The Historic Silver Mine (Polish: Zabytkowa Kopalnia Srebra) is a UNESCO World Heritage Site (since 2017) in Tarnowskie Góry, Silesia, Poland. The mine and the neighbouring Black Trout Adit are remnants of a silver mining industry. The museum is an Anchor point on the European Route of Industrial Heritage. [2]
The hoard contains 13,061 items. Among them are 12,500 cross denarii, early medieval silver ornaments, Polish and foreign coins, and silver scrap, as well as a rare collection of denarii minted by Palatine Sieciech. [1] In November, 2020, another hoard of 6500 cross denarii and 4 golden rings was found at nearly the same spot as the first hoard.
Whether silver plating or pure silver, the composite of the metal will tarnish when exposed to air and sulfur. Tarnish is a chemical reaction on the surface of metal (copper, brass, silver, etc.) and causes a layer of corrosion. In the case of silver tarnish, the silver combines with sulfur and forms silver sulfide (Ag 2 S), which is
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Półgrosz (półgroszek, lit. half-grosz) was a silver and later copper coin worth ½ of grosz and 9 denars, minted in Poland, Lithuania and Silesia. Polish silver półgrosz weighing 1-1,7g was minted mainly from c.1367 to 1526 and occasionally from 1580 to 1792, from 1765 coin was minted in copper.
Put a small amount of silver polish on a clean cloth, dampened if necessary. Rub the polish on your item in an up-and-down motion, not circular to avoid highlighting fine scratches.
Commemorative coins in Poland are special coins minted by the Polish Mint and issued by the National Bank of Poland (the only issuer of the Polish coins [2]). Each year several collector and commemorative coins are minted to mark political, historical, scientific, cultural, sporting, humanitarian and other similar events of general importance ...
The banknotes of the series of 1948 were designed by Polish painter and decorative artist Wacław Borowski.The introduction of these notes was part of the currency reform of 1950, [1] so the banknotes had to be printed quickly and in secrecy; so printing works in Poland (), Czechoslovakia (), Hungary (Pénzjegynyomda), Sweden (Riksbankens Sedeltryckeri), and Canada (British American Bank Note ...