The Czech koruna (koruna means "crown") (sign: Kc; code: CZK) has been the currency of the Czech Republic since 8 February 1993 when, together with its Slovak counterpart, it replaced the Czechoslovak koruna at par.

The official name in Czech is koruna ceská (the plural form is koruny ceské, but the genitive plural form korun ceských is usually found on banknotes). The ISO 4217 code is CZK and the local acronym is Kc, which is placed after the numeric value (e.g., "50 Kc"). One koruna equals 100 haléru (abbreviated as "h", singular: halér, nominative plural: halére).

The Czech Republic planned to adopt the euro in 2012, but its government suspended that plan in 2007. Although the country is economically better positioned than other EU Members to adopt the euro, the change not expected before 2015 due to political reluctance on the manner.

In 1993, coins were introduced in denominations of 10, 20 and 50 haléru, 1, 2, 5, 10, 20 and 50 korun. The halére (hallers) denominations were struck in aluminium, the 1, 2 and 5 korun in nickel-plated steel, the 10 korun in copper-plated steel, the 20 korun in brass-plated steel and the 50 korun with a brass-plated steel centre and a copper-plated steel ring. The 10 and 20 haléru coins were taken out of circulation by 31 October 2003. Coins are currently in circulation are the 50 haléru, 1, 2, 5, 10, 20 and 50 korun (20 korun is more commonly found as coins, whereas 50 korun is more common as a banknote). The coins all feature the Czech lion on the obverse, with the reverse featuring the value.

Since 1997, sets for collectors are also issued yearly with proof quality coins. In 2000, the 10 and 20 korun coins were minted with different obverses to commemorate the Millennium. In the beginning coins were minted in Hamburg then in the Czech Republic. There's also a tradition of issuing commemorative coins - including silver and gold coins - for numismatic purposes.

The 50 haléru coin as of 31 August 2008 ceased to be legal tender. The Central Bank says their withdrawal is due to their diminishing circulation and purchasing power. That is because only 10% of coins are returned to the central bank, or 41 million out of 410 million in circulation.

The first Czech banknotes issued in 1993 consisted of Czechoslovak notes with adhesive stamps affixed to them. Only the 100, 500 and 1000 korun denominations were overstamped, the lower denominations circulated unchanged during this transitional period. The former circulated until end-August, the latter until end-July.

A newly designed series of banknotes of denominations 20, 50, 100, 200, 500, 1000, 2000 and 5000 korun were introduced later in 1993 and in 1994 and are all in use as of 2006 - except for the first versions of 1000 and 5000 korun notes, since the security features of these notes were upgraded in the subsequent issues (However, the 2000 note is still valid in both versions, with and without the new security features). These banknotes feature renowned Czech persons on the obverse and abstract compositions on the reverse. Modern protective elements can be found on all banknotes.

The 20 korun note ceased to be valid on 31 August 2008.

The leu ([lew], plural: lei [lej]; ISO 4217 code RON; numeric code 946) is the currency of Romania. It is subdivided into 100 bani (singular: ban). On 1 July 2005, Romania underwent a currency reform, switching from the previous leu (ROL) to a new leu (RON). 1 RON is equal to 10,000 ROL.

Romania joined the European Union on 1 January 2007 and it is expected to adopt the euro in 2014.

On August 15, 1947, a revaluation took place, with a new leu replacing the old one at a rate of 20,000 old lei = 1 new leu. This revaluation, called a monetary reform or stabilisation measure (mica stabilizare, marea stabilizare), was carried out by the Communist authorities with absolutely no advance warning and without the possibility to exchange more than a fixed amount of money for the new currency. This was done in order to depose the former middle and upper classes of their last assets, after nationalization, to prepare for collectivization and to finalize the installation of communism. At the time of its introduction, 150 new lei equalled 1 U.S. dollar.

In the 1990s, after the downfall of communism, inflation ran high due to reform failures, the legalization of owning foreign currency in 1990, and the bankrupt policies of the former communist era, reaching rates as high as 300% per year in 1993. By September 2003, one euro was exchanged for more than 40,000 lei, this being its peak value. Following a number of successful monetary policies in the late 1990s and early 2000s, the situation became gradually more stable, with one digit inflation in 2005.

The Romanian leu briefly held the dubious distinction of being the world's least valued currency unit, from January (when the Turkish lira dropped six zeros) to July 2005. However, the 1,000,000 lei bill was not the highest Romanian denomination ever. This distinction belongs to the 5 million lei bill from 1947.

On 1 July 2005, the leu was revalued at the rate of 10,000 "old" lei (ROL) for one "new" leu (RON), thus psychologically bringing the purchasing power of the leu back in line with those of other major Western currencies. The term chosen for the action was "denominare", similar to the English "denomination", to signify not a conversion, but rather a total reinvention.

The first day brought difficulties adjusting to the new paper currencies and closed ATMs (that needed reprogramming) and forcing a new calculation habit that slowed down shops and annoyed some salespeople and shoppers. The old ROL currency banknotes remained in circulation until December 31, 2006 (coins remained in circulation only until December 31, 2005), but all accounts have been converted starting July 1, 2005. There is no conversion time limit between the currencies. Retailers had to display prices in both old and new currency from March 1, 2005 until June 30, 2006. The appreciation of the leu during 2005 was about 20% against a basket of major currencies.

As of 2006, the revaluation is a potential source of confusion, especially to visitors, since both old and new currency values are commonly quoted. When written, the very large amounts in old currency are usually obvious, but in speaking inhabitants might refer to an amount of 5 new lei as simply "fifty" in reference to its value 50,000 old lei.

In 1952, coins were introduced in denominations of 1, 3, 5, 10 and 25 bani, with the 1, 3 and 5 struck in aluminium bronze and the others in cupro-nickel. In 1955, cupro-nickel 50 bani were added.

In 1960, a new coinage was introduced, consisting of 15 and 25 bani, with 5 bani, 1 and 3 lei coins added in 1963. All were struck in nickel-clad steel. In 1975, aluminium replaced steel in the 5 and 15 bani, with the same change happening for the 25 bani in 1982. Aluminium 5 lei were introduced in 1978.

Following the end of the communist regime, a new coinage was introduced between 1990 and 1992, consisting of 1 leu in bronze clad steel, 5 and 10 lei in nickel plated steel, 20 and 50 lei in brass clad steel and nickel plated steel 100 lei.

As inflation took its toll, 500, 1000 and 5000 lei coins were introduced in 1999, 2000 and 2001, respectively, and were the only coins circulating when the revaluation occurred. They were all criticized for being clumsy and difficult to use. The 500 lei coins were very thick (about 0.3 cm). Despite their small value, it took only a handful of such coins to fill one's pocket. They were also made of poor material and could be occasionally found with bite marks. The 1000 lei coin was considered too small and was also cheaply made, and the 5000 lei coin was not circular (it was a dodecagon). This made it awkward to handle and difficult to use in slot machines, where it was frequently the only coin accepted. The 500, 1000 and 5000 lei coins became worth 5, 10 and 50 bani with the revaluation.

In 1952, the Ministry of Finance introduced notes for 1, 3 and 5 lei, and the Banca Republicii Populare Romane introduced 10, 25 and 100 lei notes. In 1966, the Banca Nationala a Republicii Socialiste Romania took over the production of all paper money, issuing notes for 1, 3, 5, 10, 25, 50 and 100 lei.

In 1991, 500 and 1000 lei notes were introduced, followed by 200 and 5000 lei notes in 1992, 10,000 lei in 1994, 50,000 lei in 1996, 100,000 lei in 1998, 500,000 lei in 2000 and 1 million lei in 2003. There was also a 2000 lei note, introduced in 1999; it celebrated the total solar eclipse that occurred on August 11th, 1999. The final issues of the 2000, 10,000, 50,000, 100,000, 500,000 and 1 million lei were polymer notes.

Notes in circulation at the revaluation were:

* 10,000 lei (became 1 leu)
* 50,000 lei (became 5 lei)
* 100,000 lei (became 10 lei)
* 500,000 lei (became 50 lei)
* 1,000,000 lei (became 100 lei)

In 2005, polymer notes were introduced for 1, 5, 10, 50, 100 and 500 lei. 200 lei notes were added in 2006. The designs of the 1, 5, 10, 50 and 100 lei notes are based on those of the earlier 10,000, 50,000, 100,000, 500,000 and 1 million lei notes which they replaced. The 10 lei bill was redesigned in November 2008 (most of the graphic elements are identical, some of the safety elements were withdrawn, making its safety degree similar the the lower values of 1 leu and 5 lei bills).