Founded: 1940 Capacity: 49,000 Record of attendance: 57,395 in 1940. Its official name is Estadio Alberto J. Armando. It is home to Argentine club Boca Juniors, one of the most successful and best supported clubs in the country. The 12 is the ultra (barra brava) of Boca Juniors, and is characterized by the use of drums and fireworks while the anthems are Boca Es Mi Vida (Boca is my life) and Dale, Dale Boca (Go, Go Boca).