The Modern Art Week (or Semana de Arte Moderna, in Portuguese) was an arts festival in São Paulo, Brazil, that ran from February 11 to February 18, 1922. Historically, the Week marked the start of Brazilian Modernism; though a number of individual Brazilian artists were doing modernist work before the week, it coalesced and defined the movement and introduced it to Brazilian society at large. For Brazil, it was as important as the International Exhibition of Modern Art (also known as the Armory Show), held in New York City in 1913, which became a legendary watershed date in the history of American art.