Tango is a folk culture of music and dance with more than 100 years' history. Its origin was in the South American immigrant cities of Buenos Aires and Montevideo, but with touring musicians and stage shows, has spread around the world rapidly. In over 90 countries there are groups of hard-core afficionados who turn tango into a lifestyle.
Unlike most other forms of dance genres like ballet or swing, tango is more popular among adults and older people than the young. In 2009 Tango is inducted into the United Nation's list of Intangible Heritage of Humanity.
Although there are many scattered sources of information about the Tango on the internet, many of them has disappeared. Partly this is because websites and mailing lists have declined in popularity, and social media, chatrooms and online video streams have taken their places. Unfortunately this means that many published information about this subject has become more ephemeral.