On May 31, 2016, the Czech National Bank issued the first gold coin from the Castles series. Its theme is Kost Castle. The coin is minted from 999.9 fine gold and is issued in two versions, regular and proof, which differ in surface finish and edge design. In top-quality coins, the field of the coin is highly polished and the relief is matted, the edge is smooth. Regular-quality coins have a serrated edge. The diameter of the coin is 28 mm, the weight is 15.55 g and the thickness is 1.9 mm. When minting coins, deviations in diameter of 0.1 mm and in thickness of 0.15 mm are allowed. The weight is allowed to deviate upwards by 0.062 g and the gold content by 0.01%. On the obverse of the coin, in the upper half of the coin field, there is a composition of heraldic animals from the large state emblem in shields. In the middle is a Czech lion, to the left of it is a Moravian eagle and to the right of it is a Silesian eagle. Below the composition of heraldic animals is depicted the portal of the door to the castle chapel. Inside the portal in the lower half of the coin field is the name of the state "ČESKÁ REPUBLIKA", the name of the cycle "HRADY" and the denomination of the coin with the abbreviation of the monetary unit "5000 CZK". The mark of the Czech Mint, which is formed by a composition of the letters "Č" and "M", is at the bottom edge of the coin. The reverse of the coin depicts the Kost castle. At the top edge of the coin are the initials of the coin's author, academic sculptor Zbyněk Fojtů, which are formed by a composition of the letters "F" and "Z", followed by the text "HRAD" "KOST" and the year of minting "2016", which are separated by dots. A red catalogue card is supplied with each coin, which contains a description of the coin and its plastic representation. diameter: 28 mm mint: Czech Mint edge: serrated
| Manufacturer | ČNB |
| Material | Gold |
| Weight | 15.55 g |
| Diameter | 28 mm |
| Purity | 999.9/1000 Au |