The Bulgarian Monetary Unit refers to the official currency of Bulgaria, which is the lev. The lev has a rich history dating back to the 19th century, and has undergone various transformations and name changes over the years. While the term Bulgarian Monetary Unit is an accurate description of the lev, there are other synonyms that can be used to refer to the currency. These synonyms include the Bulgarian lev, the BGN, and the български лев (Bulgarian Cyrillic for Bulgarian lev). Regardless of the term used, the Bulgarian Monetary Unit remains an important aspect of Bulgaria's economy and financial system.