More than seven hundred couples from 43 countries around the world are participating (Photo: AP)
The dance form originated in the 1880s in the region between Argentina and Uruguay (Photo: AP)
Tango de Pista (Salon Tango) and Tango Escenario (Stage Tango) are two categories in which couples compete (Photo: AP)
Earlier couples with men and women were only allowed to compete, but in 2013 same sex couples were included (Photo: AP)
The competition was first held in 2003 in Buenos Aires, Argentina (Photo: AP)
the World Tango Championship is held in August as part of the the Tango festival every year (Photo: AP)
Tango couple Daniel Arroyo and Juan Pablo Ramirez participating in the competition (Photo: AP)
Katherine Laiton and Leonardo Luizaga, from Argentina, compete in the stage category at the Tango World Championship, in Buenos Aires, Argentina (Photo: AP)
Couple's from around the world compete in two categories.