Tunisian dinar
It is a criminal offence in Tunisia to import or export dinar. Every year, each citizen can convert into foreign currency up to 6,000 Tunisian dinars before departure from the country. Therefore, prices at duty-free shops are in convertible currencies such as euros, US dollars and British pounds. There are many converting ATMs in the country for tourists.
Tunisian rial
The rial was issued by the Ottoman rulers of Tunis. Although known as the piastre by Europeans, it was not equal to the Turkish kuruş, also known as the piastre. From 1855, the rial was on a bimetallic standard of 1 rial = 0.17716 grams pure gold or 2.7873 grams pure silver. In 1887, the gold content of the 25 rial coin was slightly reduced to make it equivalent to 15 French francs. In 1891, this conversion rate (more conveniently expressed as 1 rial = 60 centimes) was used when the Tunisian franc replaced the rial.