The Historic Centre of Vienna holds significant architecture from three periods (Middle Ages, the Baroque period, and the Gründerzeit), and is a capital of music. It still is a living tribute to Habsburg times. This dynasty ruled most of Central Europe between 1273 and 1918. Its emperor Frederick III transformed Vienna from a medieval market town into an imperial residence. This attracted other nobility and a lot of artists. Two of the city's most prominent buildings, the Hofburg and the