Bullrings are believed to originate their bullfighting tradition from the Roman gladiator games. It visited bullrings, parks, amphitheatres and arenas. In the year 2000, Andalusia's roughly 100 bullrings hosted 1,139 "corridas". Bullrings evolved as specialized sporting arenas hand-in-hand with the sport that demanded them. Of the 56 official bullrings in Peru, the Plaza de Acho ranks most prominently. These dimensions make it one of the largest bullrings in Spain. It is one of several bullrings maintained by the Portuguese-American community throughout California's Central Valley. Due to their short length and fast action, these tracks are often nicknamed "bullrings". He organized his own team of assistants and forced bullrings to hire them. Today this is sometimes also practised in bullrings, either temporary or permanent, using calves rather.