The Mining Museum Plan
Work in the mint was launched in 1627. The operation was not extended until 1628 when Jindřich Šlik got in touch with the master of the mint in Nurnmberg, Jan Puzer of Puzenau. His significance is proved by the fact that at the time he used to sign as Master of the Plana Mint. Beside him and later on Jan Kandler on his own worked as a master of the mint until 1641. In this function he was followed by the following masters: Jan Vodňanský /1641 1643 /, Oldřich Zikmund Mirošovský of Mirošov /1644 1649 /, Kašpar František Begner of Rossenfeld / 1649 1651 /, Jan Jiři Beck from Munggau /1651 1655 /, and Jan Pelet from Hundt /1655 1665/.
The first silver was delivered into the mint from the mine Fortune and Happines in 1629. The output of silver was relatively low and by far could not be sufficient for the work of the mint, and in 1664 mining for silver was completely stopped.
It appears from from accounts that have been preserved that thalers, groschen / i.e. threekreutzer / and even a small number of golden ducats were coined in Plana. Even such kreutzers were coined that that have been verified in preserved coinage only.
In 1641 1651 and 1660 1662, i.e. in thirteen years, about 3,300 talents of pure silver were coined. That means that during those thirteen years about 22,700 thalers and 363,250 groschen were minted, and during the four decades about 68,000 thalers and more than one million groschen.
Financial profit from that undertaking was surprisingly bad. 11,876 zl. / gold coins / were altogether spent on silver mining in 1623 1645 while silver worth 12,318 zl. / gold coins / was gained. Profit from that period represented but 442 zl., i.e. mere 3.59%. That last factual reports from 1660 1662 show that while the value of gained silver was 768 zl., the expenses were 1758 zl., which represents a loss of 990 zl. Profit was not reached and operation in the mines was completely stopped.
Profits from coining the gained metal could not recompense the loss from mining. The profit of 6,399 zl. 57 kr. was countered with an expenditure of 6,334 zl. 26 kr., thus but little profit was reached, mere 1.026%, if the operation was quite unprofitable. Running the mint is to be considered more as a manifestation of the Šlik's pride showing they were entitled to the right of coinage and able to carry it out.