Rosario is an Italian restaurant in Istanbul, Türkiye, and the useful context is what kind of evening it seems built to deliver. What matters most is ingredient-led cooking, comfort and a clear sense of place; a polished mid-to-high price point makes it a restaurant to choose deliberately, not accidentally. The best reason to book is warmth, produce and familiar pleasures handled with care: a clear use case is more valuable here than another vague promise of quality.