Peso in the context of "Roman currency"

The dollar sign, also known as the peso sign, is a currency symbol consisting of a capital ⟨S⟩ crossed with one or two vertical strokes ($ or depending on typeface), used to indicate the unit of various currencies around the world, including most currencies denominated "dollar" or "peso". The explicitly double-barred sign is called cifrão in the Portuguese language.

The sign is also used in several compound currency symbols, such as the Brazilian real (R$) and the United States dollar (US$): in local use, the nationality prefix is usually omitted. In countries that have other currency symbols, the US dollar is often assumed and the "US" prefix omitted.

The Spanish dollar, originally known as the piece of eight (Spanish: real de a ocho, peso duro, peso fuerte or peso), and much later also dólar is a silver coin of approximately 38 mm (1.5 in) diameter worth eight Spanish reales. It was minted in the Spanish Empire following a monetary reform in 1497 with content 25.563 g (0.8219 ozt) fine silver. It was widely used as the first international currency because of its uniformity in standard and milling characteristics. Some countries countermarked the Spanish dollar so it could be used as their local currency.

Because the Spanish dollar was widely used in Europe, the Americas, and the Far East, it became the first world currency by the 16th century.

Roman currency for most of Roman history consisted of gold, silver, bronze, orichalcum (brass), and copper coinage. From its introduction during the Republic, in the third century BC, through Imperial times, Roman currency saw many changes in form, denomination, and composition. A feature was the inflationary debasement and replacement of coins over the centuries. Notable examples of this followed the reforms of Diocletian. This trend continued with Byzantine currency.

Due to the economic power and longevity of the Roman state, Roman currency was widely used throughout western Eurasia and northern Africa from classical times into the Middle Ages. It served as a model for the currencies of the Muslim caliphates and the European states during the Middle Ages and the Modern Era. Roman currency names survive today in many countries via the Carolingian monetary system, such as the dinar (from the denarius coin), the British pound (a translation of the Roman libra, a unit of weight), the peso (also a translation of libra), and the words for the general concept of money in the Iberian Romance languages (e.g. Spanish dinero and Portuguese dinheiro).

Dollar is the name of more than 25 currencies. The United States dollar, named after the international currency known as the Spanish dollar, was established in 1792 and is the first so named that still survives. Others include the Australian dollar, Brunei dollar, Canadian dollar, Eastern Caribbean dollar, Hong Kong dollar, Jamaican dollar, Liberian dollar, Namibian dollar, New Taiwan dollar, New Zealand dollar, Singapore dollar, Trinidad and Tobago dollar, and several others. The symbol for most of those currencies is the dollar sign $; the same symbol is used by many countries using peso currencies.

The name 'dollar' originates from the tolar which was the name of a 29-gram (1.0 oz) silver coin called the Joachimsthaler minted in 1519 in the western part of Bohemia (now the Czech Republic). The word thaler itself comes from the German word Thal, i.e. 'valley'.

The real (English: /ɹeɪˈɑl/ Spanish: /reˈal/) (meaning: "royal", plural: reales) was a unit of currency in Spain for several centuries after the mid-14th century. It underwent several changes in value relative to other units throughout its lifetime until it was replaced by the peseta in 1868. The most common denomination for the currency was the silver eight-real Spanish dollar (Real de a 8) or peso which was used throughout Europe, America and Asia during the height of the Spanish Empire.

The Mexican peso (symbol: $; currency code: MXN; also abbreviated Mex$ to distinguish it from other peso-denominated currencies; referred to as the peso, Mexican peso, or colloquially varo) is the official currency of Mexico. The peso was first introduced in 1863, replacing the old Spanish colonial real. The Mexican peso is subdivided into 100 centavos, represented by "¢". Mexican banknotes are issued by the Bank of Mexico in various denominations and feature vibrant colors and imagery representing Mexican culture and history. Modern peso and dollar currencies have a common origin in the 16th–19th century Spanish dollar, most continuing to use its sign, "$".

The current ISO 4217 code for the peso is MXN; the "N" refers to the "new peso". Prior to the 1993 revaluation, the code MXP was used. The Mexican peso is the 16th most traded currency in the world, the third most traded currency from the Americas (after the United States dollar and Canadian dollar), and the most traded currency from Latin America. As of 11 November 2025, the peso's exchange rate was $18.32 per U.S. dollar, $13.07 per Canadian dollar, $24.07 per Pound sterling and $21.21 per Euro.