The music of Italy ranges across a broad spectrum of opera and instrumental classical music, the traditional styles of the country's different regions, and a body of popular music drawn from both native and imported sources. Music has traditionally been one of the cultural markers of Italian national and ethnic identity and holds an important position in society and in politics. Italian innovation in musical scales, harmony, notation, and theatre enabled the development of opera in the late 16th century, and much of modern European classical music, such as the symphony and concerto. Instrumental and vocal classical music is an iconic part of Italian identity, spanning experimental art music and international fusions to symphonic music and opera. Opera is integral to Italian musical culture, and has become a major segment of popular music. The Neapolitan song, Canzone Napoletana, and the Cantautori singer/songwriter traditions are also popular domestic styles that form an important part of the Italian music industry, alongside imported genres like jazz, rock and hip hop. Italian folk music is an important part of the country's musical heritage, and spans a diverse array of regional styles, instruments and dances.