Salzburg is the fourth-largest city in Austria and the city of the federal state of Salzburg. The city's ''Old Town'' has internationally renowned baroque architecture and one of the best-preserved city centres north of the Alps. It was listed as a UNESCO World Heritage Site in 1997. The city is noted for its Alpine setting. Salzburg was the birthplace of 18th-century composer Wolfgang Amadeus Mozart. In the mid-20th century, the city was the setting for parts of the American musical and film The Sound of Music, which features famous landmarks in Austria. The musical was a partnership between Richard Rodgers and Oscar Hammerstein II. The capital city of the State of Salzburg, the city has three universities.