Grzegorz Romańczyk, Grosze Głogowskie i krakowskie Zygmunt I Starego z lat 1505-1548, Cracow 2022
One of the latest studies of an important period of Polish modern numismatics, the time of monetary reforms that completely changed Polish money, i.e. the period of the reign of Sigismund I the Old. This book is the fruit of the author's many years of work on the minting of this king. It is a novel approach to the subject of numismatics, i.e. a combination of a book and a coin catalog. The author's intention was to create a publication not only for a narrow group of numismatists who collect the discussed coins of this king, but for everyone who likes history or would like to start their adventure with numismatics. The book describes minting technology in the 16th century, monetary reforms, Decius' "Treatise on Minting Coinage," minting ordinances of the period, and many facts about the life and reign of Sigismund I the Old. The catalog section, which presents more than 300 variants of groszes from the Głogów and Kraków mints, presents the types and subtypes of Pogon, Eagle and Crown coins discussed. The author reached many coins that have not been previously presented in any other publications. The rarity of the coins was determined according to the number of their occurrences in the archives of auction houses and in museum and private collections to which the author had access. This is the first such comprehensive and thorough study of this period as well as this denomination from the two mints described. Many collectors may be pleasantly surprised to find that all the coins presented from numismatic auctions have found their way into private collections. Therefore, not a few people will find their own coin in the catalog, which in addition may turn out to be a very rare variant. An added bonus to the book are two bookmarks, one paper one with the author's greetings and his signature and the other magnetic one from the friendly Numismatic Portal.