Salzburg is the capital of the Austrian state of Salzburg, the fourth largest city in Austria and the oldest city in Austria. The old town of Salzburg is built on the hill, and the Salzach River flows through it. The Salzburg Fortress on the top of the hill is a symbol of the city of Salzburg. The fortress is 250 meters long and 150 meters wide at its widest point. It is the largest surviving fortress in Central Europe. It is also the best view overlooking the old town. Salzburg has many castles and palaces, and its Baroque architecture has a unique charm, mainly represented by the Salzburg Catholic Church and the Mirabell Palace. The Mirabell Palace was built by the Archbishop Wolf Dietrich for his lover, and the name means "amazingly beautiful." The food alley is the most famous pedestrian street in the Old Town of Salzburg. Mozart was born on the 9th of this street on January 27, 1756. He lived here until 1773 and left Salzburg. The Mozart Museum is now in the building where Mozart was born. Salzburg is also the home of the conductor Karajan and the film "The Voice of Music". It is Austria's veritable city of music. The horse carries the tourists in the old city, and the horseshoes make a crisp sound on the stone road. From time to time, the roadside came to the sound of the street performers, bringing out the sound of music flowing in the blood of the city.