The São Paulo Bienal (w www.bienalsaopaulo.globo.com) has been held in the Parque do Ibirapuera every two years since 1951. It’s widely considered to be the most important exhibition of contemporary visual art in Latin America and is only rivalled in the world by the similar event held in Venice. Each country sponsors work by its most influential contemporary artists, while a select few artists (living or dead) are also chosen by the Bienal’s curators. At best, the Bienal can be an exhilarating venue to see important retrospectives and experience a wealth of innovative art, but at worst it can be little more than an embarrassing – or amusing – showing of fourth-rate global art. The Bienal is now held in October and November in even-numbered years.