Salzburg was famously Mozart’s hometown, but the musical genius lived in a number of addresses in Vienna over his lifetime, including nearly three years with his family in spacious apartments along the tiny Domgasse alley. This is where he composed The Marriage of Figaro, among other works. Dating from the Middle Ages, the Domgasse is tucked right behind Stephansdom cathedral, where in 1782 Mozart married Constanze Weber. While the Mozarthaus’s original apartment furnishings, not surprisingly, are long gone, the re-created third floor details Mozart’s personal and professional world, including the role that Freemasonry played in his life. Among the highlights are a late-18th-century clock that plays a Mozart organ waltz. Frequent live concerts are performed at this location as well.