Buenos Aires is one of the largest metropolises in the world. One thirds of Argentina’s 41 million people live in Buenos Aires. But until the beginning of the 19th century Buenos Aires was only a small town with a mixed population of Spanish colonists, native Americans and black slaves from Africa. In 1810, influenced by the French Revolution, the Argentine people overthrew the Spanish Governor and declared independence. The new government made a conscious decision to change the racial structure of the population, which led to the massive immigrations from Span, Italy and other parts of Europe to Argentina. By the end of the 19th century the original population of Buenos Aires has been completely swamped by the European immigrants. Although we can trace tango to its African roots, the main inventors of tango were the European immigrants of the late 19th century and early 20th century who built the modern city of Buenos Aires.
Here is an example of the tango danced in the milongas of Buenos Aires.