Austria's capital city is Wiener, commonly known as Wien to the locals. It is the largest city in Austria and is located on the Danube River. It is a major cultural and economic hub in Central Europe and has been an important city since the Middle Ages. Wiener is home to many famous landmarks, including the Vienna State Opera, the Hofburg Palace, and the Schönbrunn Palace. It is also known for its vibrant nightlife and numerous cafes.