The basic monetary unit of several Middle Eastern countries including Iran, Saudi Arabia, and Oman.
From Spanish 'real' meaning 'royal', ultimately from Latin 'regalis'. The currency name spread through Islamic world via Spanish silver coins that were widely traded in the Ottoman Empire and Persia.
The Iranian rial has suffered from severe inflation - in 2020, it took over 42,000 rials to equal one US dollar, making it one of the world's least valuable currencies. Despite sharing the name, different countries' rials have vastly different values and are not interchangeable.
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