In Poland the National Bank of Poland, which is also the central bank, issues 15-22 collectible coins per year. However only some of these coins are actual commemoratives. Of course there are coins minted for various occasions, like the 2016 Rio de Janeiro Olympics. Although some coins, for example the one shown on the photo, doesn't honor anything. People buy them because of something mentioned in The Ten Rules: they simply love them. And despite the fact many coins are issued, they are in usually small numbers, typically 10 000 to 30 000 pieces for silver coins and 600 to 2 000 for gold coins. Also especially the silver coins are not priced very high. Personally I manage to get most of my coins at about 50$ a piece. That policy makes coin collecting easier for beginners, because buying them does not really require very much knowledge and they eye appeal is very good. Like most special collectibles these coins of course have much lower denominations, than the actual value of the coin or only the metal in it. From the most known series I can certainly mention three : "Story of Polish Coin", Stanislaw's August Treasures"(based on a series of paintings) and "Polish Painters". The last one consists of rectangular shaped "coins". But emitting coins like that is not a new trend. Various shaped commemoratives were emitted by the Second Republic of Poland from around the 1919 till the Second World War at 1939. After the war traditions weren't discontinued: Bank of the People's Republic of Poland also started very famous series like for example "Animals of the World" emitted for more than 20 years. Due to most of these coins are proof finish and were encapsulated just after striking their eye appeal is still very good. But no one buys coins that have grading lower than 65, because they are supposed to be collector's pieces and not just some circulated coins. There is also one honorable mention: Nordic Gold 2 zoty coins. They were made from a special alloy named Nordic Gold. It does not contain real gold, but consists of Copper, Aluminum, Zinc and tin(it's chemical model would be CuAl5Zn5Sn1). These coins are minted normally like circulating coins and sold for 2 zloty, which is also the denomination and were usually emitted with normal commemorative coins. However NBP(Narodowy Bank Polski) discontinued them in 2014, because "The striking costs were too high". They were replaced with a 5 zloty coins, which are not worth mentioning in this article. I hope that this piece of writing was interesting to read and encourage you to look more, if you're interested.