I am the currency of a nation known for its rich history, diverse landscapes, and a language that's a bridge between Europe and Asia. My banknotes often feature iconic historical figures and symbols, and my value has seen considerable fluctuations over the years.

1. I was once part of the Ottoman Empire.
2. I have been revalued multiple times in the 20th century.
3. My current series of banknotes features prominent figures from national history and literature.
4. The country using me shares borders with multiple countries across two continents.