I am the official currency of a nation that straddles two continents, a land known for its unique blend of European and Asian influences. My value is tied to a history of economic reforms and stability, and my symbols often reflect ancient cultural motifs alongside modern industrial prowess. Which currency am I?

1. My central bank is known for its independent monetary policies and the use of inflation targeting.
2. I am used in a region that has seen substantial foreign investment in recent decades.
3. My banknotes and coins often display depictions of historical figures and architectural marvels.
4. Though I am not widely used internationally, I'm pivotal in the financial health of the country I represent.