I am the official currency of a nation that straddles two continents, is known for its rich history and vibrant culture, and boasts a city that was once the capital of both the Roman and Ottoman Empires. My value is often influenced by political and economic developments within the region, and I am used in a wide variety of transactions, from small purchases to international trade. Which currency am I?

1. My country has coastlines on both the Mediterranean and Black Seas.
2. My banknotes often feature prominent historical figures or landmarks.
3. My country's economy includes tourism, manufacturing, and agriculture.
4. I have experienced periods of high inflation and currency devaluation.