After a decade of planning, the euro was introduced on January 1, 1999; for the first three years, it was an 'invisible' currency, used solely for accounting and electronic payments. On January 1, 2002, coins and banknotes were introduced, and the largest cash changeover in history occurred in 12 EU countries.
The Ottoman Lira was introduced as the Ottoman Empire's primary currency in 1844, replacing the kurus. Following the fall of the Ottoman Empire in 1923 and the foundation of the Republic of Turkey, the Lira was renamed the Turkish Lira.