Photo credits
The coin photos on the home page come from Wikimedia Commons and are shared under Creative Commons licences. Thank you to the authors.
Denar of Bolesław I the Brave (type BOLIZLAVO DVX)
Author: Gabinet Numizmatyczny D. Marciniak
Licence: CC BY 3.0
Denar of Bolesław III Wrymouth (bishop and knight)
Author: Gabinet Numizmatyczny Damian Marciniak
Licence: CC BY-SA 4.0
Denar of Mieszko II Lambert
Author: Gabinet Numizmatyczny D. Marciniak
Licence: CC BY 3.0
Prague groschen of Wenceslaus II
Author: Classical Numismatic Group, Inc. (cngcoins.com)
Licence: CC BY-SA 2.5 and GFDL
Gros tournois of Philip IV the Fair
Author: York Museums Trust / Rebecca Griffiths, Portable Antiquities Scheme (findID 888084)
Licence: CC BY 2.0
The photos have been processed: obverse and reverse were separated, the background was removed, the scale was aligned and the files were saved as WebP. The appearance of the coins has not been altered.